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GeoVax Presents Data on GEO-CM04S1, a Next Generation Covid-19 Vaccine

Presentation Made During the 24th Annual World Vaccine Congress


ATLANTA, GA - (NewMediaWire) - April 04, 2024 - GeoVax Labs, Inc. (Nasdaq: GOVX), a biotechnology company developing immunotherapies and vaccines against cancers and infectious diseases, today announced that its Chief Scientific Officer, Mark Newman, PhD, presented data on GEO-CM04S1, the Company’s next-generation Covid-19 vaccine candidate, during the 24th Annual World Vaccine Congress in Washington, DC.

During his presentation, titled “Vaccine Induction of Broadly-Specific Antibody and T Cell Responses to Combat SARS-CoV-2 Variation”, Dr. Newman described GeoVax’s development program for GEO-CM04S1. The data presented were generated in collaboration with scientists at Georgia State University using the human ACE2 transgenic mice, one of the “gold standard” small animal models used for studying Covid vaccines. GEO-CM04S1 incorporates both the spike (S) and nucleocapsid (N) antigens of SARS-CoV-2 and is specifically designed to induce broadly specific antibody and T cell responses. The animal studies were designed to characterize the contributions of immune responses to both the S and N and documented the additive effects, which were most evident in the control of disease and the associated lung inflammation and damage. The central message was that vaccine-induced immunity protects against infections, serious disease symptoms and death against the original Wuhan variant as well as the Omicron XBB.1.5 variant, which is the basis of the currently approved mRNA booster vaccines.

Dr. Newman commented after his presentation, “GEO-CM04S1 continues to meet our highest expectations, inducing immune system-based protection that is broadly specific and functional against Covid variants. I anticipate similar findings will be observed in our Phase 2 clinical trials as the studies are unblinded later this year.”

About GEO-CM04S1

GEO-CM04S1 is based on GeoVax’s MVA viral vector platform, which supports the presentation of multiple vaccine antigens to the immune system in a single dose. GEO-CM04S1 encodes for both the spike (S) and nucleocapsid (N) antigens of SARS-CoV-2 and is specifically designed to induce both antibody and T cell responses to those parts of the virus less likely to mutate over time. The more broadly functional engagement of the immune system is designed to protect against severe disease caused by continually emerging variants of Covid-19. Vaccines of this format should not require frequent and repeated modification or updating.

GEO-CM04S1 is currently being evaluated in three ongoing Phase 2 clinical trials:

  • As a primary vaccine in immunocompromised patients (with hematologic cancers receiving cell transplants or CAR-T therapy). Identifier: NCT04977024. A recent presentation of unpublished data from the open-label portion of the trial indicates that GEO-CM04S1 is highly immunogenic in these patients, inducing both antibody responses, including neutralizing antibodies, and T cell responses.
  • As a booster vaccine in immunocompromised patients with chronic lymphocytic leukemia (CLL), a recognized high-risk group for whom current mRNA vaccines and monoclonal antibody (MAb) therapies appear inadequate relative to providing protective immunity. Identifier: NCT05672355.
  • As a booster vaccine for healthy patients who have previously received the Pfizer or Moderna mRNA vaccine. This trial was fully enrolled in September 2023 and final results are expected in Fourth Quarter 2024, reflecting a 12-month tracking of study patients. Identifier: NCT04639466.

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:

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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