Tag: GeoVax Labs

Research News and Market Data on GOVX

• Last updated: 02 July 2025
• Created: 02 July 2025

With global cases rising and bipartisan momentum for pandemic preparedness, GeoVax’s GEO-MVA vaccine advances on an expedited development track toward commercialization and revenue generation

ATLANTA, GA — July 2, 2025 — GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing multi-antigen vaccines and immunotherapies against infectious diseases and cancer, today emphasized the growing global public health importance of its GEO-MVA Mpox/smallpox vaccine in response to rising public health threats and a rapidly evolving regulatory environment.

With favorable regulatory input from the European Medicines Agency (EMA), GEO-MVA is on an expedited path toward market access—accelerating GeoVax’s focus toward regulatory approval and commercialization.

“GeoVax is entering a value inflection phase,” said David Dodd, Chairman and CEO. “The EMA’s expedited development path brings us closer to regulatory registration and commercial readiness, providing the opportunity to address urgent public health needs, expanding the critically needed supply option of MVA-vaccine, addressing both expanding outbreak needs and stockpile opportunities.”

Modern Platform for Variant-Responsive Stockpiling

GeoVax’s development-stage continuous avian cell line process is anticipated to provide increased production of MVA-based vaccines, the ability to quickly respond to epidemics and pandemics, local implementation of MVA-based vaccine manufacturing and overall reduced production costs. 

With confirmed Mpox cases across multiple U.S. states, throughout Europe and new clade Ib outbreaks in West and Central Africa, the urgency for additional MVA-vaccine supply options is increasingly, critically important. 

“There is a clear need for diversity in stockpile planning,” Dodd added. “GEO-MVA is well-positioned to serve as a complementary or alternative solution where current, single-source options fall short.  Ending the current monopoly of MVA-vaccine will benefit public health worldwide, providing an expanded supply option of this critically needed vaccine.”

EMA Scientific Advice and BARDA RRPV Proposal Expedite Readiness

GeoVax recently received favorable Scientific Advice from the EMA, confirming an expedited regulatory development path for GEO-MVA. This milestone enhances the product’s standing with international regulatory bodies and opens pathways to revenue-generating opportunities across Europe and beyond.

In parallel, GeoVax’s advanced MVA-based vaccine manufacturing proposal under BARDA’s Rapid Response Partnership Vehicle (RRPV) remains under active review. The program is designed to fund scalable vaccine platforms, eliminating the dependency for stockpiling of MVA-based vaccines relative to high-consequence threats such as smallpox.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax is also developing a vaccine targeting Mpox and smallpox and, based on recent regulatory guidance, anticipates progressing directly to a Phase 3 clinical evaluation, omitting Phase 1 and Phase 2 trials. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

Company Contact:

info@geovax.com

678-384-7220

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Media Contact:

Jessica Starman

media@geovax.com 

Research News and Market Data on GOVX

• Last updated: 01 July 2025

Atlanta, GA, July 1, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing immunotherapies and vaccines against cancer and infectious diseases, today announced that it has entered into definitive securities purchase agreements with several institutional and individual investors for the purchase and sale of approximately 9.2 million units, each comprised of one share of the Company’s common stock and warrants, as described below, to purchase shares of the Company’s common stock, at a price of $0.65 per unit in a public offering. The Company will issue warrants to purchase up to approximately 18.5 million shares of common stock. The warrants will have an exercise price of $0.65 per share, will be exercisable immediately following the date of issuance and will have a term of five years following the date of issuance.

Roth Capital Partners is acting as the exclusive placement agent for the offering.

The gross proceeds to the Company from this offering are expected to be approximately $6 million, before deducting the placement agent’s fees and other offering expenses payable by the Company. The Company intends to use the net proceeds from this offering for working capital and general corporate purposes. The closing of the offering is expected to occur on or about July 2, 2025, subject to the satisfaction of customary closing conditions.

The shares in the offering described above are being offered by the Company pursuant to a registration statement on Form S-1 (File No. 333-288085) previously filed with the Securities and Exchange Commission (the ‘SEC’) and declared effective by the SEC on June 30, 2025. The offering is being made only by means of a prospectus, including a prospectus supplement, forming a part of the effective registration statement, relating to the offering that will be filed with the SEC. Electronic copies of the final prospectus supplement and accompanying prospectus may be obtained, when available, on the SEC’s website at http://www.sec.gov or by contacting Roth Capital Partners, LLC at 888 San Clemente Drive, Newport Beach, CA 92660, by phone at (800) 678-9147 or by accessing the SEC’s website, www.sec.gov.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any of the securities described herein, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax is also developing a vaccine targeting Mpox and smallpox and, based on recent regulatory guidance, anticipates progressing directly to a Phase 3 clinical evaluation, omitting Phase 1 and Phase 2 trials. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

Company Contact:

info@geovax.com

678-384-7220

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Media Contact:

Jessica Starman

media@geovax.com 

Research News and Market Data on GOVX

Patent Supports Multi‑Antigenic VLP-MVA Vaccine Design for Products Used Against Endemic and Emerging Infectious Diseases

ATLANTA, GA, June 25, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a biotechnology company developing multi-antigen vaccines and immunotherapies against infectious diseases and cancers, today announced that the U.S. Patent and Trademark Office has issued U.S. Patent No. 12,329,808, from patent application No.18,394,580, titled “Compositions and Methods for Generating an Immune Response to Treat or Prevent Malaria.”

The patent covers compositions comprising GeoVax’s recombinant Modified Vaccinia Ankara (MVA) viral vector expressing immunogenic proteins from Plasmodium falciparum (the causative agent of malaria). The novel construct supports expression of virus-like particles (VLPs) assembled from P. falciparum circumsporozoite protein (CSP) or gametocyte surface protein Pfs230 fused to a Marburg virus glycoprotein transmembrane domain, together with the Marburg VP40 matrix protein. The expressed proteins are assembled in vivo as VLPs, which is an antigen presentation design used to enhance vaccine potency and induce both humoral and T-cell responses.

David Dodd, GeoVax President and CEO, commented, “This new patent further demonstrates our commitment to advancing critically important vaccines that address both globally persistent and emerging high-consequence pathogens. The vaccine construct exemplifies our multi-antigenic platform strategy that is critical to pandemic preparedness and global health security. While our clinical-stage programs remain our immediate focus, protecting our innovation pipeline through issued patents supports long-term value creation and future public health impact.”

GeoVax’s intellectual property estate now encompasses over 135 granted or pending patent applications across 23 distinct patent families, reinforcing the company’s strategic position across oncology, infectious diseases, and biodefense platforms. This broad portfolio includes strong protection for its Gedeptin® oncolytic cancer therapy, recently expanded to cover synergistic combinations with radiation, and multiple MVA‑based vaccine constructs targeting SARS‑CoV‑2, Mpox/smallpox, Zika, Ebola, Sudan, and Marburg viruses.

Malaria remains a persistent global health threat, causing over 600,000 deaths yearly, primarily in sub-Saharan Africa. The use of GeoVax’s versatile MVA-based platform offers the potential for inducing durable immunity against both such latent and emerging pathogens.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax is also developing a vaccine targeting Mpox and smallpox and, based on recent regulatory guidance, anticipates progressing directly to a Phase 3 clinical evaluation, omitting Phase 1 and Phase 2 trials. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

Company Contact:                                                                             

info@geovax.com                                                                               

678-384-7220                                                                                      

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Media Contact:

Jessica Starman

media@geovax.com 

Research News and Market Data on GOVX

 

Supports Advancement of GeoVax’s Phase 2 Gedeptin® Trial in Recurrent Head and Neck Cancer

ATLANTA, GA, June 24, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing multi-antigen vaccines and immunotherapies for infectious diseases and cancer, today commented on the U.S. Food and Drug Administration’s recent approval of Keytruda® (pembrolizumab) for use in resectable, locally advanced head and neck squamous cell carcinoma (HNSCC) tumors expressing PD-L1 as determined by an FDA approved test. This regulatory milestone marks a significant advancement in the curative-intent treatment landscape for head and neck cancer and affirms the therapeutic strategy underlying GeoVax’s Gedeptin® development program.

An editorial by Rosenberg and Vokes in New England Journal of Medicine (NEJM) noted that the study forming the basis of FDA’s approval represents the first demonstration of benefit for PD-1 inhibition in the curative setting for HNSCC, with implications for evolving neoadjuvant immunotherapy paradigms.

GeoVax is planning to initiate a Phase 2 clinical trial of Gedeptin® in combination with a checkpoint inhibitor, such as pembrolizumab, in patients with locally advanced HNSCC scheduled for curative-intent surgery. The trial aims to improve tumor clearance and reduce relapse by combining the immune-priming effect of Gedeptin’s targeted cytotoxicity with the systemic immune activation of checkpoint inhibition.

The Phase 2 study, expected to launch in 2026, will evaluate pathologic response, recurrence rates, and biomarker-defined immunologic changes when Gedeptin is used as neoadjuvant therapy with checkpoint inhibitors. Importantly, the NEJM editorial emphasized the need to optimize patient selection and treatment duration in the immunotherapy era, aligning with GeoVax’s biomarker-driven approach.

“The NEJM publication and FDA approval of Keytruda in resectable HNSCC signals a new era in curative-intent cancer therapy,” said David Dodd, Chairman and CEO of GeoVax. “By combining Gedeptin therapy with pembrolizumab, we aim to enhance local tumor eradication while unlocking systemic anti-tumor immunity, potentially reducing both local and distant recurrence.”

“We believe Gedeptin’s tumor-targeted cytotoxicity can enhance immunotherapy efficacy, particularly in the perioperative window where anti-tumor immunity can be primed,” added Dr. Kelly McKee, GeoVax’s Chief Medical Officer. “We are excited to embark on the next phase of Gedeptin development as we attempt to build on the important advances being made in this disease”.

For more information about the KEYNOTE-689 study, see the June 18, 2025 publication in the New England Journal of Medicine.

About Gedeptin

Gedeptin® is a gene-directed enzyme prodrug therapy (GDEPT) delivered intratumorally via an adenoviral vector encoding purine nucleoside phosphorylase (PNP). Upon systemic administration of fludarabine, the enzyme catalyzes the generation of a cytotoxic agent selectively within the tumor microenvironment. This mechanism provides dual cytotoxicity and immune modulation with minimal systemic exposure.

Gedeptin has been granted Orphan Drug Designation by the FDA for the treatment of oral and pharyngeal cancers and is protected by a growing intellectual property portfolio. GeoVax’s ongoing innovation in immune-sensitizing therapies supports a broader strategy to complement checkpoint inhibitors and overcome tumor immune resistance across solid tumor types.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax is also developing a vaccine targeting Mpox and smallpox and, based on recent regulatory guidance, anticipates progressing directly to a Phase 3 clinical evaluation, omitting Phase 1 and Phase 2 trials. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.

Company Contact:                                                                             

info@geovax.com                                                                               

678-384-7220                                                                                      

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Media Contact:

Jessica Starman

media@geovax.com 

Research News and Market Data on GOVX

ATLANTA, GA, June 10, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing multi-antigen vaccines and immunotherapies against infectious diseases and solid tumors, today announced that clinical data for its next-generation COVID-19 multi-antigen vaccine candidate, GEO-CM04S1, will be presented at the European Hematology Association (EHA) 2025 Hybrid Congress, taking place June 12–15, 2025, in Milan, Italy and online.

Alexey V. Danilov, M.D., Ph.D., Associate Director of the Toni Stephenson Lymphoma Center and Professor in the Department of Hematology and Hematopoietic Cell Transplantation at the City of Hope Comprehensive Cancer Center in Duarte, California, will present a poster titled: “MVA-Based GEO-CM04S1 Vaccine Results in Improved Cellular Immune Response in Patients with Chronic Lymphocytic Leukemia (CLL) Compared with mRNA-Based Vaccine: Initial Results of a Phase II Randomized Study”. The poster will be featured on Saturday, June 14, 2025, from 18:30 to 18:30 CEST in the Poster Hall, as part of the session on Infections in Hematology (including supportive care/therapy).

The presentation will highlight initial results from a Phase II randomized clinical trial highlighting the superior cellular immune response of GEO-CM04S1 compared to an authorized mRNA-based COVID-19 vaccine in CLL patients—a population known to exhibit suboptimal protective responses to COVID-19 and other vaccines due to immune dysfunction. The findings will underscore the differentiated mechanism and clinical potential of the GeoVax MVA multi-antigen platform, particularly in immunocompromised individuals.

“GEO-CM04S1 continues to show promise as a vaccine option for populations with suboptimal protection from existing COVID-19 vaccines,” said Kelly T. McKee, Jr., M.D., Chief Medical Officer of GeoVax. “We are proud to have these important data showcased at EHA2025, reflecting the real-world needs of patients with hematologic malignancies.”

About GEO-CM04S1

GEO-CM04S1 is a multi-antigen COVID-19 vaccine designed using a synthetic Modified Vaccinia Ankara (MVA) vector platform. The vaccine expresses both spike (S) and nucleocapsid (N) antigens of SARS-CoV-2, aiming to provide broader and more durable immune protection. It is currently being evaluated in Phase 2 clinical trials in both immunocompromised and healthy adults.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Research News and Market Data on GOVX

Preclinical Studies Demonstrate Durable Protection Against SARS-CoV-2 Variants, Including Omicron XBB.1.5, Driven by T-Cell Responses

ATLANTA, GA, June 9, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing immunotherapies and multi-antigen vaccines against infectious diseases and solid tumors, today recapped two scientific poster presentations delivered at the Keystone Symposia on Vaccinology: Horizons Across Disease, Demography and Technology, held June 4–7, 2025, in Washington, D.C.

The presentations, titled MVA-Vectored Multi-Antigen COVID-19 Vaccines Induce Protective Immunity Against SARS-CoV-2 Variants Spanning Alpha to Omicron in Preclinical Animal Models, and GEO-CM04S1 Vaccine Candidate Maintains Potent Cross-Reactivity Against Original SARS-CoV-2 B.1 and Omicron Subvariant XBB.1.5, were delivered by Drs. Pratima Kumari and Amany Elsharkawy, respectively, members of GeoVax’s scientific team and its collaborators, during the June 5 and June 6 poster sessions. The presentations spotlight the Company’s Modified Vaccinia Ankara (MVA)-vectored COVID-19 vaccine candidates, GEO-CM04S1 and GEO-CM02, and their ability to induce durable, cross-reactive immunity against SARS-CoV-2 variants in preclinical animal models. These studies underscore the immunologic breadth, durability, and cross-variant protection of GeoVax’s multi-antigen design strategy—especially important for addressing variant evasion and suboptimal immune response in vulnerable patient populations.

Key Findings from Studies

GEO-CM02 Study – Poster #1050 | Presenter: Dr. Pratima Kumari, GeoVax Scientist

This presentation detailed findings for GEO-CM02, a multi-antigen MVA-based vaccine expressing the spike (S), membrane (M), and envelope (E) proteins.

• In hACE2 mouse models, a single dose provided complete protection against both the original Wuhan strain and the Omicron BA.1 variant.
• Two-dose regimens generated high neutralizing antibody levels, reduced viral loads in lung and brain tissues, and lowered inflammatory markers- indicating enhanced immune memory.
• Notably, early protection was achieved prior to detectable neutralizing antibodies, further supporting the role of innate and cellular immune responses in viral control. This underscores the value of the multi-antigen MVA-based vaccine platform, particularly as the virus continues to mutate.

GEO-CM04S1 Study – Poster #2047 | Presenter: Dr. Amany Elsharkawy, Georgia State University Scientist

This study evaluated the immunogenicity and protective efficacy of GEO-CM04S1, an MVA-vectored vaccine co-expressing spike (S) and nucleocapsid (N) proteins, in a K18-hACE2 mouse model. Mice were challenged intranasally with either the original B.1 strain or the Omicron XBB.1.5 subvariant.

• GEO-CM04S1 conferred full protection against clinical disease, lung injury, and inflammation in both viral challenge models.
• Despite the absence of detectable neutralizing antibodies against XBB.1.5, vaccinated animals were fully protected, suggesting antibody-independent protection.
• Immune cell depletion studies revealed that CD4+ T cells, not B cells or CD8+ T cells, were critical for protection, highlighting the vaccine’s ability to drive T cell–mediated immunity across variants.

“These experimental findings document the value of inducing broadly specific immune responses to protect against evolving SARS-CoV-2 variants,” said Mark Newman, PhD, Chief Scientific Officer of GeoVax. “We believe the use of multi-antigen vaccines could provide significant benefit by limiting the need to continually update COVID vaccines and by limiting the need for yearly booster doses.” 

GeoVax’s MVA vaccine platform is designed to address gaps in pandemic preparedness and public health resilience, with lead vaccine candidate GEO-CM04S1 currently being evaluated in multiple Phase 2 clinical trials for COVID-19.

About GEO-CM04S1

GEO-CM04S1 is a synthetic next-generation, multi-antigen MVA-vectored COVID-19 vaccine co-expressing spike (S) and nucleocapsid (N) antigens, designed to induce both broad antibody and T-cell responses. It is being evaluated in three ongoing Phase 2 clinical trials:

1. A primary vaccine for immunocompromised individuals (e.g., post-transplant, CAR-T, or hematologic cancers)
2. A booster for patients with chronic lymphocytic leukemia (CLL)
3. A booster for healthy adults previously immunized with mRNA vaccines

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. 

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Research News and Market Data on GOVX

 

Highlights Critical Role of Multi-Antigen GEO-CM04S1 in Protecting Vulnerable Populations

ATLANTA, GA, May 27, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing multi-antigen vaccines and immunotherapies, today announced its strong support for the U.S. Food and Drug Administration (FDA) advisory panel’s updated COVID-19 vaccine recommendations. The new guidance prioritizes protection for older adults and individuals with chronic health conditions, moving away from a universal vaccination strategy and signaling a more focused public health approach – one that GeoVax believes that it is well equipped to support through its multi-antigen COVID-19 vaccine, GEO-CM04S1. The advisory panel’s recommendations follow details on how the FDA is changing the type of evidence it will accept from vaccine manufacturers to approve updated COVID-19 vaccines as outlined in an editorial published last week in the New England Journal of Medicine.

GeoVax’s COVID-19 candidate, GEO-CM04S1, is designed to address the precise needs of high-risk populations, including those identified in the new FDA guidance. Developed on the Modified Vaccinia Ankara (MVA) platform, GEO-CM04S1 delivers multiple antigens—specifically, both the spike (S) and nucleocapsid (N) proteins of SARS-CoV-2—to induce broad, durable immune responses, including both antibody and T-cell immunity. This approach is believed to enhance protection, especially in individuals with compromised immune systems, such as those undergoing cancer treatment, organ transplant recipients, and others whose response to current mRNA vaccines may be suboptimal.

“GEO-CM04S1 embodies the next generation of COVID-19 vaccines—vaccines that offer layered immune protection and are purpose-built for the most vulnerable individuals,” said David Dodd, Chairman and CEO of GeoVax. “The FDA’s new guidance underscores the urgency of advancing vaccine solutions tailored for those at greatest risk. Our clinical data thus far appear to demonstrate that GEO-CM04S1 delivers a more comprehensive immune response, and we believe it is uniquely suited to fulfill the mission articulated by the FDA and the U.S. Department of Health and Human Services (HHS).”

The FDA’s updated recommendations mirror recent priorities set forth by HHS and the National Science and Technology Council (NSTC), which have called for a pivot toward vaccine technologies that provide durable, variant-resistant protection. This policy evolution reflects growing concerns about waning immunity, limited breadth of response, and manufacturing vulnerabilities associated with single-antigen platforms.

GeoVax’s alignment with these priorities is reflected not only in its COVID-19 vaccine design but also in its commitment to domestic manufacturing and pandemic preparedness. GEO-CM04S1 is currently being evaluated in multiple Phase 2 clinical trials. Interim results from a Phase 2 trial in patients with chronic lymphocytic leukemia (CLL) demonstrated superior T-cell responses relative to an FDA-approved mRNA vaccine, prompting the study’s independent Data Safety Monitoring Board to halt the comparator arm and continue enrollment exclusively with GEO-CM04S1.

“The future of pandemic response lies in broad, durable, and accessible solutions that meet the needs of real-world patients—not just the healthy and immunocompetent,” added Dodd. “We’re building a vaccine portfolio that we believe will meet this challenge, and we are encouraged by the FDA’s and HHS’s recognition of the need for more sophisticated vaccine approaches.”

With over 40 million immunocompromised adults in the U.S. and an annual global need estimated to be in excess of 400 million, GeoVax believes GEO-CM04S1, with an estimated market potential exceeding $30 billion, is uniquely positioned to potentially capture a significant market opportunity while advancing the public health mission. Its MVA-based COVID-19 approach enables expression of multiple antigens with a well-established safety profile, making it especially well-suited for vulnerable and immunocompromised populations.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. 

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Research news and Market Data on GOVX

GEO-CM04S1 Demonstrates Superior Protection in Immunocompromised Populations; Fully Aligned with HHS Priorities for Durable, Broad-Spectrum Immunization

ATLANTA, GA, May 20, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing vaccines and immunotherapies for infectious diseases and cancer, today issued a statement in response to the U.S. Department of Health and Human Services’ (HHS) anticipated changes to COVID-19 vaccine recommendations.

According to recent reports, HHS is preparing to limit blanket vaccine guidance in favor of a risk-based approach focused on older adults and those with chronic health problems. This pivot away from one-size-fits-all vaccine recommendations underscores the urgent need for next-generation immunization strategies—precisely the role that GeoVax’s multi-antigen COVID-19 vaccine, GEO-CM04S1, is designed to fulfill.

“As public health strategy shifts toward protecting those most vulnerable, the demand increases for vaccines that work where others fall short,” said David Dodd, Chairman and CEO of GeoVax. “GEO-CM04S1 delivers broad, durable immunity even in immunocompromised patients—a population estimated at over 40 million adults in the U.S. that are inadequately served by the current authorized, single-antigen mRNA vaccines.”

GEO-CM04S1: Purpose-Built for the New Vaccine Paradigm

GEO-CM04S1 is based on the Modified Vaccinia Ankara (MVA) platform and expresses both Spike (S) and Nucleocapsid (N) proteins—offering multi-antigen protection against SARS-CoV-2. This broader design induces both antibody and T cell responses, essential for robust, durable protection against continually evolving COVID-19 variants and is especially critical in populations with weakened immune systems.

Recent interim results from a Phase 2 clinical trial in patients with chronic lymphocytic leukemia (CLL) demonstrated a superior T cell response rate versus a leading mRNA vaccine. The trial’s independent Data Safety Monitoring Board recommended and implemented continuing enrollment in the GEO-CM04S1 arm while halting the underperforming mRNA comparator arm.

Aligned with the New HHS Biosecurity Vision

GEO-CM04S1 is fully aligned with the new strategic direction from HHS Secretary Kennedy, who has called for a focus toward multi-antigen vaccine technologies that can deliver durable, variant-adaptive immunity while prioritizing safety and domestic production.

GeoVax’s MVA vaccines offer:

• Multi-antigen breadth: Including both S and N antigens for protection across variants.
• Durability: Sustained antibody and T cell immunity—even in immunocompromised individuals.
• Safety: MVA is non-replicating and approved for use in vulnerable groups such as transplant patients, pregnant women, and children.
• Domestic advanced manufacturing: Using an avian continuous cell line platform that eliminates reliance on specialized pathogen-free eggs and a slow vaccine manufacturing process, enabling scalable U.S.-based vaccine production aligned with President Trump’s recent Executive Order on pharmaceutical onshoring.

“The HHS call for broader, more resilient vaccine solutions is well-founded,” Dodd added. “GEO-CM04S1 is not only scientifically advanced but strategically aligned with our nation’s public health and biosecurity goals.”

Multiple Trials Support Path to Licensure

GEO-CM04S1 is currently in three active Phase 2 trials, evaluating its use among:

1. Immunocompromised blood cancer patients in preparation for stem cell transplantation or CAR-T therapy (in comparison to mRNA-based vaccine),  
2. Immunocompromised patients with Chronic Lymphocytic Leukemia (in comparison to mRNA vaccine), and
3. Healthy adults, previously vaccinated with a mRNA vaccine as a more robust, more durable booster following mRNA vaccination.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. 

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Research News and Market Data on GOVX

Allowed Patent Claims Cover the Synergistic Combination of Gedeptin® Therapy with Radiation As a Targeted Approach for Solid Tumors

Atlanta, GA – May 7, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing immunotherapies and vaccines against solid tumors and infectious diseases, announced today that the U.S. Patent and Trademark Office has issued a Notice of Allowance related to U.S. patent application 17/502,101 entitled “Enhanced Therapeutic Usage of a Purine Nucleoside Phosphorylase or Nucleoside Hydrolase Prodrug”. The allowed claims further strengthen GeoVax’s intellectual property position in the oncology space.

The allowed claims describe a method for treating solid tumors—including glioblastoma, breast, prostate, head and neck, glioma, and lung cancers—through the direct intratumoral administration of an adenoviral vector encoding purine nucleoside phosphorylase (Ad/PNP), followed by local administration of the prodrug fludarabine phosphate (F-araAMP), and subsequent radiation therapy. This triple-combination strategy is designed to generate local, targeted cytotoxic activity within the tumor microenvironment while minimizing systemic toxicity.

The allowed patent joins the growing Gedeptin intellectual property portfolio, which was exclusively licensed to GeoVax through a prior agreement with PNP Therapeutics, Inc. and the University of Alabama at Birmingham (UAB)/Southern Research. Under the agreement, GeoVax has assumed all licensing rights and IP prosecution responsibilities for the Gedeptin platform.

David Dodd, Chairman and CEO of GeoVax, commented, “This allowed patent underscores the clinical and commercial promise of our Gedeptin platform and demonstrates our commitment to expanding therapeutic options for patients with difficult-to-treat cancers. While the claims do not directly mirror our ongoing clinical programs, they establish a critical foundation for future directions, including potential integration with advanced delivery systems for tumors that are challenging to access.”

Dodd continued, “The USPTO’s recognition of this therapeutic method further validates our approach and underscores the growing value of our wholly owned, co-owned, and in-licensed intellectual property estate, now standing at over 135 granted or pending patent applications spread across 23 distinct patent families”.

Having successfully completed a Phase 1/2a study, as monotherapy in advanced head and Neck cancer patients, Gedeptin is scheduled to begin a Phase 2 trial in combination with an Immune Check Inhibitor (ICI) for patients with first recurrence of head and neck cancer. The newly allowed claims provide further protection as GeoVax explores expanded applications, including novel device-based delivery approaches in potential partnership with interventional oncology companies.

About Gedeptin

Gedeptin is a viral-vectored gene therapy that employs a non-replicating adenoviral vector encoding the E. coli enzyme purine nucleoside phosphorylase (PNP). When injected directly into a tumor and followed by systemic administration of the prodrug fludarabine phosphate, PNP enzymatically converts the prodrug into a cytotoxic metabolite (fluoroadenine), resulting in selective killing of tumor cells by disrupting RNA and protein synthesis.

This tumor-targeted approach offers several key advantages:

• Localized cytotoxicity with reduced systemic side effects,
• Potential synergy with immune checkpoint inhibitors (ICIs),
• Applicability across multiple solid tumor types, particularly those accessible for intratumoral injection.

Gedeptin will soon be evaluated in a Phase 2 clinical trial for patients with first recurrence of head and neck cancer in combination with an approved ICI. It has been granted Orphan Drug Designation by the U.S. FDA for intratumoral treatment of oral and pharyngeal cancers.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. 

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696

Research News and Market Data on GOVX

GEO-CM04S1 Demonstrates Durable T Cell and Antibody Responses in Healthy and Immunocompromised Populations

ATLANTA, GA, April 24, 2025 – GeoVax Labs, Inc. (Nasdaq: GOVX), a clinical-stage biotechnology company developing vaccines and immunotherapies for infectious diseases and cancer, today recapped the successful presentation of new clinical data on its multi-antigen SARS-CoV-2 vaccine candidate, GEO-CM04S1, delivered at the 25th Annual World Vaccine Congress in Washington, D.C.

The presentation, titled “Phase 2b Study Results That Evaluated and Compared GeoVax’s Multi-Antigen Vaccine Candidate (GEO-CM04S1) to an Approved Vaccine Against COVID-19,” was given by Don J. Diamond, Ph.D. on April 24, 2025. It highlighted results across several Phase 1 and 2 clinical trials, including studies involving healthy volunteers as well as immunocompromised patients such as stem cell transplant recipients and those with chronic lymphocytic leukemia (CLL).

GEO-CM04S1, based on the synthetic Modified Vaccinia Ankara (MVA) vector platform, uniquely expresses both the Spike (S) and Nucleocapsid (N) antigens of SARS-CoV-2—resulting in broad and durable immune responses even in populations that have historically responded poorly to mRNA vaccines.

Key Highlights from the Clinical Data Presented

Robust Immune Response in Healthy Adults

• In a Phase 1 trial, 100% of participants (34/34) seroconverted (i.e., produced antibodies) for Spike IgG, and 94% (32/34) for Nucleocapsid IgG.
• 98% (48/49) demonstrated a T cell response to either antigen following vaccination.
• No serious safety concerns were reported across varying dose levels.

Comparable Immunogenicity at Lower Doses (Phase 2 Booster Trial)

• Healthy volunteers who had previously received mRNA or protein-based COVID-19 vaccines were boosted with GEO-CM04S1 at two dose levels (10⁷ vs 10⁸ pfu).
• Spike, RBD, and Nucleocapsid IgG antibody responses, as well as neutralization titers against multiple COVID-19 variants (including XBB.1.5), increased significantly at both dose levels with no meaningful differences between them.
• T cell responses increased significantly post-vaccination, regardless of baseline immunity.

Superior Performance in Immunocompromised Populations

• In stem cell transplant recipients, GEO-CM04S1 induced ELISA antibody titers and T cell responses that exceeded those observed in healthy volunteers.
• In a randomized Phase 2 trial comparing GEO-CM04S1 to the Pfizer-BioNTech (Comirnaty®) vaccine in patients with Chronic Lymphocytic Leukemia, GEO-CM04S1 demonstrated a significantly higher T cell response rate.
  • At Day 56 of the study: 6 of 15 patients in the GEO-CM04S1 arm achieved ≥3-fold increases in Spike or Nucleocapsid-specific T cells versus 2 of 14 in the Comirnaty arm.
  • The Data and Safety Monitoring Board (DSMB) recommended halting enrollment in the Pfizer arm due to underperformance, while continuing enrollment of the GEO-CM04S1 arm.

“We were pleased to share these promising results with global leaders in vaccinology,” said Don J. Diamond, Ph.D. “The data underscore the value of our dual-antigen approach, particularly for patients underserved by existing single-antigen vaccines. GEO-CM04S1 not only drives strong antibody and T cell immunity in healthy adults, but also in the immunocompromised—a population historically underserved by single-antigen mRNA vaccines.”

David A. Dodd, Chairman, President, and CEO of GeoVax, added: “The clinical performance of GEO-CM04S1 across diverse and high-risk populations supports our mission to deliver broad and lasting protection through next-generation vaccines. Our data continues to demonstrate strong, durable immune responses in both healthy and immunocompromised populations—a critical feature of our vaccine for public health preparedness. As we continue to advance this program, these results reinforce our confidence in the MVA platform as a foundation for addressing future public health threats.”

About GEO-CM04S1

GEO-CM04S1 is a next-generation COVID-19 vaccine based on the Modified Vaccinia Ankara (MVA) vector originally developed at City of Hope. Its multi-antigen design expresses both Spike and Nucleocapsid proteins of SARS-CoV-2, promoting broad, cross-reactive immunity. The vaccine is being evaluated in three ongoing Phase 2 clinical trials.

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel vaccines against infectious diseases and therapies for solid tumor cancers. The Company’s lead clinical program is GEO-CM04S1, a next-generation COVID-19 vaccine currently in three Phase 2 clinical trials, being evaluated as (1) a primary vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient, (2) a booster vaccine in patients with chronic lymphocytic leukemia (CLL) and (3) a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. In oncology the lead clinical program is evaluating a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, having recently completed a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. The Company is also developing GEO-MVA, a vaccine targeting Mpox and smallpox. GeoVax has a strong IP portfolio in support of its technologies and product candidates, holding worldwide rights for its technologies and products. For more information about the current status of our clinical trials and other updates, visit our website: www.geovax.com.

Forward-Looking Statements

This release contains forward-looking statements regarding GeoVax’s business plans. The words “believe,” “look forward to,” “may,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “could,” “target,” “potential,” “is likely,” “will,” “expect” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Actual results may differ materially from those included in these statements due to a variety of factors, including whether: GeoVax is able to obtain acceptable results from ongoing or future clinical trials of its investigational products, GeoVax’s immuno-oncology products and preventative vaccines can provoke the desired responses, and those products or vaccines can be used effectively, GeoVax’s viral vector technology adequately amplifies immune responses to cancer antigens, GeoVax can develop and manufacture its immuno-oncology products and preventative vaccines with the desired characteristics in a timely manner, GeoVax’s immuno-oncology products and preventative vaccines will be safe for human use, GeoVax’s vaccines will effectively prevent targeted infections in humans, GeoVax’s immuno-oncology products and preventative vaccines will receive regulatory approvals necessary to be licensed and marketed, GeoVax raises required capital to complete development, there is development of competitive products that may be more effective or easier to use than GeoVax’s products, GeoVax will be able to enter into favorable manufacturing and distribution agreements, and other factors, over which GeoVax has no control.

Further information on our risk factors is contained in our periodic reports on Form 10-Q and Form 10-K that we have filed and will file with the SEC. Any forward-looking statement made by us herein speaks only as of the date on which it is made. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law. 

Company Contact:                 

info@geovax.com                   

678-384-7220                          

Investor Relations Contact:

geovax@precisionaq.com

212-698-8696