Preclinical Data for GEO-CM02 Demonstrates Single-Dose Protection

Against Multiple SARS-CoV-2 Variants

Atlanta, GA, September 20, 2023 – GeoVax Labs, Inc. (Nasdaq: GOVX), a biotechnology company developing immunotherapies and vaccines against cancers and infectious diseases, announced today the presentation of preclinical vaccine efficacy data for GEO-CM02, a multi-antigen SARS-CoV-2 vaccine. The new unpublished data were presented during the Keystone Symposia on Molecular and Cellular Biology, Vaccinology During and After COVID-19, being held in Atlanta, Georgia on September 17-20, 2023.

Presentation Details & Summary:

Abstract Title:           

MVA-vectored multi-antigen COVID-19 vaccines induce protective immunity against SARS-CoV-2 variants spanning Alpha to Omicron in preclinical animal models

Abstract Authors:     

Shannon Stone¹, Amany Elsharkawy¹, Janhavi Natekar¹, Sreenivasa Rao Oruganti², Mary Hauser², Arban Domi², Pratima Kumari², Anchala Guglani¹, Mark Newman², and Mukesh Kumar¹

¹ Georgia State University   ² GeoVax Labs, Inc.

Presenting Author:     Shannon Stone, Georgia State University

First-generation SARS-CoV-2 vaccines based on the spike (S) protein induce neutralizing antibodies provide significant levels of protection. However, vaccine efficacy is disrupted by emerging variants that contribute to neutralizing antibody evasion, requiring updating and booster doses. To address this limitation, GeoVax has designed multi-antigen SARS-CoV-2 vaccines based on the S, membrane (M), and envelope (E) proteins, which are designed to engage both the humoral (antibody) and cellular (T-cell) arms of the immune system and to broaden both the function and specificity. Efficacy of the vaccine, designated GEO-CM02, was tested using the industry standard, lethal hACE2 transgenic mouse model.

The poster presentation (viewed here), highlighted the following data:

• The GEO-CM02 vaccine induced immune responses that were efficacious against the original Wuhan strain and BA.1 Omicron variant with a single dose.
• Animals were protected prior to the detection of neutralizing antibodies, likely indicating a critical T-cell contribution.
• GEO-CM02 significantly reduced or eliminated inflammation and immunopathology in the lungs of vaccinated animals.

Together, these data indicate that immunization with the multi-antigen GEO-CM02 vaccine can protect against severe disease and death induced by SARS-CoV-2 infection and regardless of the variant.

Mark Newman, Ph.D., GeoVax’s Chief Scientific Officer, commented, “As noted in this presentation, the first-generation SARS-CoV-2 vaccines were designed based on the S protein of the SARS-CoV-2 virus with the goal of inducing neutralizing antibodies. While this approach was successful, the limitations in the face of continually emerging variants are now well documented. The data generated in the GEO-CM02 studies validate our hypothesis that vaccines designed to induce both antibodies and T-cells to multiple viral structural proteins can address the issue of viral variation and escape from the immune system. The multi-antigen, MVA-vectored vaccine design is currently being evaluated by GeoVax in three Phase 2 clinical trials using a similar vaccine (GEO-CM04S1).”

About GeoVax

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel therapies and vaccines for solid tumor cancers and many of the world’s most threatening infectious diseases. The company’s lead program in oncology is a novel oncolytic solid tumor gene-directed therapy, Gedeptin^®, presently in a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax’s lead infectious disease candidate is GEO-CM04S1, a next-generation COVID-19 vaccine targeting high-risk immunocompromised patient populations. Currently in three Phase 2 clinical trials, GEO-CM04S1 is being evaluated as 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, and as a booster vaccine in patients with chronic lymphocytic leukemia (CLL). In addition, GEO-CM04S1 is in a Phase 2 clinical trial evaluating the vaccine as a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. GeoVax has a leadership team who have driven significant value creation across multiple life science companies over the past several decades. For more information, 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. 

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