GeoVax Announces Initiation of Phase 2 Clinical Trial of COVID-19 Vaccine Booster in Patients with Chronic Lymphocytic Leukemia

Seeking Improved Immune Response vs mRNA Vaccine

ATLANTA, GA, July 20, 2023 — GeoVax Labs, Inc. (Nasdaq: GOVX), a biotechnology company developing immunotherapies and vaccines against cancers and infectious diseases, today announced the start of an investigator-initiated clinical trial (ClinicalTrials.gov Identifier: NCT05672355), titled “ Randomized observer-blinded phase 2 trial of COVID-19 booster with GEO-CM04S1 or Pfizer-BioNTech Bivalent vaccine in patients with chronic lymphocytic leukemia ,” at City of Hope National Medical Center, led by Alexey Danilov, M.D., PhD as principal investigator. GEO-CM04S1, a multi-antigenic SARS-CoV-2 vaccine that targets the spike (S) and nucleocapsid (N) proteins of SARS-CoV-2, is actively under clinical study by GeoVax in severely immunocompromised individuals, as well as in healthy adults for use as a universal heterologous booster.

Despite a high vaccination rate, chronic lymphocytic leukemia (CLL) patients may be at high risk for lethal COVID-19 infection due to poor immune response to COVID-19 infections or vaccination. The GEO-CM04S1 vaccine uses a modified vaccinia virus (MVA) backbone that may be more effective at inducing COVID-19 immunity in patients with poor humoral immune responses since MVA strongly induces T cell expansion even in the background of immunosuppression. Targeting both the spike and nucleocapsid protein antigens broaden the specificity of the immune responses and protects against the loss of efficacy associated with the significant sequence variation observed with the spike antigen.

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The study will examine the use of two injections of GEO-CM04S1 three months apart to assess immune responses in these vulnerable patients, with the Pfizer-BioNTech Bivalent vaccine as the control arm. Participants will be randomized 1:1 to receive two boosters with either the GEO-CM04S1 or the control vaccine. The primary immune response outcome will be 56 days following the first booster injection. Up to 40 participants will be treated in each arm, with immune responses evaluated at the interim and final analyses in each arm.

Brian Koffman, M.D.C.M., FCFP DABFP (retired) MS Ed, Executive Vice President and Chief Medical Officer of the CLL Society, a nonprofit dedicated to the unmet needs of those diagnosed with CLL/small lymphocytic lymphoma (SLL), commented, “Despite the current authorized COVID-19 vaccines providing protective immunity among the majority of patient populations, individuals with CLL/SLL, regardless of their treatment status, have had less predictable and often insufficient immune responses to the currently authorized vaccines. Within the CLL/SLL patient population, more robust and durable protective immunity is needed, especially next-generation vaccines that could induce stronger T cell and antibody responses. This trial leverages past success with a similar type of vaccine used for protection against a different viral infection in the immunocompromised to develop a vaccine intended to provide enhanced and more durable protection against COVID-19 infections in the high-risk CLL/SLL population. The CLL Society and the CLL/SLL community welcome this study and look forward to the results.”

Kelly McKee, M.D., GeoVax Chief Medical Officer, commented, “Unpublished clinical data recently presented at several medical conferences confirmed our earlier findings in healthy adults that GEO-CM04S1 stimulated a robust, durable, and broad-based humoral and cellular immune response against multiple SARS-CoV-2 variants, and by extension, to immunocompromised patients. Validation of these findings in additional patients with hematologic malignancies, who have received CAR-T and stem cell transplants, is underway as we seek to provide a vaccine solution to those individuals unable to mount adequate protective responses with currently available COVID-19 vaccines. We expect the CLL trial will further confirm the potential benefit of CM04S1 in another population of immunocompromised individuals.”

David Dodd, GeoVax President, and CEO, added, “ We are excited to begin this third important study for CM04S1 and look forward to sharing progress reports as we advance. We believe the CM04S1 vaccine, containing the two antigens, S and N, along with the recognized antibody and cellular immune responses resulting from the MVA approach, has the potential to offer greater booster protection than that from the current vaccines in use, as well as provide a greater degree of protection within immunocompromised patients.”

About GEO-CM04S1

GEO-CM04S1 is a next-generation COVID-19 vaccine based on GeoVax’s MVA viral vector platform, which supports the presentation of multiple vaccine antigens to the immune system in a single dose. CM04S1 presents both the spike and nucleocapsid antigens of SARS-CoV-2 and is specifically designed to induce both antibody and T cell responses to non-variable parts of the virus. The more broadly specific and functional engagement of the immune system is designed to protect against the new and continually emerging variants of COVID-19. Based on data from animal models and a completed Phase 1 clinical study, vaccine-induced immune responses were shown to recognize both early and later variants of SARS-CoV-2, including the Omicron variant. Vaccines of this format should not require repeated modification and updating.

A recent presentation of unpublished data from the open-label portion of the Phase 2 trial of CM04S1 ( ClinicalTrials.gov Identifier: NCT04977024) in patients undergoing hematological cancer treatment (i.e., patients who have reduced immune system function as a result of treatment) indicates that CM04S1 is highly immunogenic in these patients, inducing both antibody responses, including neutralizing antibodies, and T cell responses. These data support the planned progression of the Phase 2 clinical study, which will include a direct comparison to currently approved mRNA vaccines. CM04S1 also continues to advance in another Phase 2 clinical trial as a booster for healthy patients who have previously received the Pfizer or Moderna mRNA vaccine (ClinicalTrials.gov Identifier: NCT04639466). Data from these studies will form the basis for comparing vaccine potential in unique patient groups as well as the general population.

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 two Phase 2 clinical trials, GEO-CM04S1 is being evaluated as a COVID-19 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. In addition, GEO-CM04S1 is in 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.

Source: GeoVax

Georgia Life Sciences Joins National Coalition Calling for PAHPA Reauthorization

September 22, 2026
Georgia Life Sciences (GLS) has joined more than 80 organizations from across industry, academia, public health and the biosecurity community in calling on congressional leaders to fully reauthorize the Pandemic and All-Hazards Preparedness Act (PAHPA) before the end of 2026. Led by the Johns Hopkins Center for Health Security, the coalition urged congressional leaders to advance a comprehensive reauthorization of PAHPA, the federal framework that supports the nation’s ability to prepare for and respond to public health emergencies and other health security threats. First enacted in 2006, PAHPA established and strengthened critical components of the nation’s health security infrastructure, including the Biomedical Advanced Research and Development Authority (BARDA). The law also supports public-private partnerships involved in the research, development, manufacturing and procurement of medical countermeasures, including vaccines, therapeutics and diagnostics. PAHPA’s authorization expired in 2023 and key provisions have since continued through short-term extensions. The coalition is calling for a comprehensive reauthorization that provides greater stability and ensures the nation’s preparedness infrastructure can continue adapting to emerging biological, infectious disease and other health security threats. For the life sciences industry, these programs are particularly important. Partnerships between government and industry can help move promising technologies from research through development and manufacturing while maintaining capabilities needed to respond quickly during an emergency. The Biotechnology Innovation Organization (BIO), also a signatory to the letter, has identified several priorities for reauthorization, including continued authorization of BARDA, the Strategic National Stockpile, Project BioShield and the Pandemic Influenza Program, as well as incentives supporting the development of medical countermeasures. Georgia Life Sciences is proud to join organizations across the country in supporting a strong and sustainable national framework for health security, preparedness and biomedical innovation. Read the coalition letter and view the full list of signatories.

Georgia Life Sciences Urges Protection of Patient Access as Georgia Implements Medicaid Changes

September 14, 2026
Georgia Life Sciences has submitted comments to the Georgia Department of Community Health (DCH) regarding the Georgia Pathways to Coverage program and implementation of new federal Medicaid requirements. As Georgia prepares for these changes, Georgia Life Sciences is urging state leaders to prioritize continuity of care and minimize unnecessary administrative barriers that could delay or disrupt access to medically necessary treatment . This is particularly important for Georgians living with serious, chronic, rare, and medically complex conditions who may rely on ongoing medications, diagnostics, therapies, medical technologies, specialty care, and coordinated treatment plans. Even temporary disruptions in coverage can interrupt care and create additional challenges for patients and families. In its comments, Georgia Life Sciences encouraged DCH to protect continuity of coverage during eligibility and redetermination processes, provide patients and caregivers with clear and timely information, minimize unnecessary administrative burdens, and establish appropriate safeguards when a coverage disruption could interrupt an established course of treatment. “As Georgia implements these new federal requirements, we want to ensure that patients remain at the center of the process,” said Maria Thacker Goethe, MPH, President & CEO of Georgia Life Sciences. “Administrative changes should not become barriers between patients and the care they need. Protecting continuity of care is particularly important for Georgians managing serious and complex health conditions.” Read Georgia Life Sciences’ full comments to DCH here.

White House Fact Sheet: President Donald J. Trump Announces Deal with Nine Additional Pharmaceutical Manufacturers to Lower Drug Prices for Americans

August 31, 2026
The White House, August 31, 2026 - ADVANCING MOST-FAVORED-NATION (MFN) PRICING: Today, President Donald J. Trump announced nine new agreements with pharmaceutical manufacturers to lower prescription drug prices for Americans in line with the lowest prices paid by other developed nations (known as the most-favored-nation, or MFN, price). The agreements bring the total number of pharmaceutical manufacturers with MFN deals to 26, covering 89% of the branded drug market. The nine manufacturers are comprised of mid-sized pharmaceutical companies, including Alcon, Astellas Pharma, BeOne Medicines, BridgeBio, CSL, Kyowa Kirin, Sun Pharma, Teva Pharmaceuticals, and UCB. The agreements reduce prices on drugs that treat numerous costly, chronic, and even rare diseases, including hemophilia, Parkinson’s disease, macular degeneration, glaucoma, liver disease, skin conditions, and various forms of cancer. The agreements will provide every State Medicaid program in the country access to MFN drug prices on products made by the nine companies, resulting in billions of dollars in savings for Americans and continuing President Trump’s historic efforts to strengthen the program for the most vulnerable. The agreements ensure foreign nations can no longer use price controls to freeride on American innovation by guaranteeing MFN prices on all new innovative medicines the nine companies bring to market. Each of these manufacturers has agreed to fundamentally rebalance international drug pricing by providing MFN pricing to American patients. BOLSTERING AMERICA’S PHARMACEUTICAL SUPPLY CHAINS AND RESERVES: These nine pharmaceutical manufacturers committed to invest at least $19.6 billion collectively in U.S. manufacturing in the near term. Additionally, as part of the MFN agreements, several companies are donating active pharmaceutical ingredients for key products to the Strategic Active Pharmaceutical Ingredients Reserve (SAPIR) to reduce reliance on foreign nations and ensure the United States has an adequate supply of such products in the event of an emergency. UCB will contribute 163 tons of levetiracetam, an anticonvulsant used to control and prevent certain types of seizures, to the SAPIR. Sun Pharma will contribute 71.4 tons of clindamycin and 6.75 tons of doxycycline; both antibiotics to treat bacterial infections, to the SAPIR. Teva Pharmaceuticals will contribute 45 metric tons of metronidazole, an antibiotic and antiprotozoal used to treat certain bacterial and parasitic infections, and 4.8 tons of amlodipine, an antihypertensive drug, to the SAPIR. Astellas will contribute 25 kg of tacrolimus, an immunosuppressant used to prevent organ rejection in people who have had organ transplants, to the SAPIR. LOWERING COSTS FOR AMERICANS: President Trump’s decisive and historic actions are lowering drug prices for the American people. Since its February launch, patients have saved more than $700 million on medicines through TrumpRx, including massive discounts on some of the most popular and costly medications used to treat obesity and infertility. In July of 2026, senior citizens without access to GLP-1 coverage to treat obesity gained access for just $50 per month. In the two months since the launch of this program, over 500,000 seniors have saved a total of $216 million dollars on these life-changing medicines. The Council of Economic Advisers estimates the total savings from President Trump’s MFN deals to reach $600 billion over the next decade. DELIVERING ON PROMISES TO PUT AMERICAN PATIENTS FIRST: President Trump is delivering on promises for American patients, accomplishing historic wins that the political establishment did not believe were possible. On May 12, 2025, President Trump signed an Executive Order titled: “Delivering Most-Favored-Nation Prescription Drug Pricing to American Patients” directing the Administration to take numerous actions to bring American drug prices in line with those paid by similar nations. On July 31, 2025, President Trump sent letters to 17 of the leading pharmaceutical manufacturers outlining the steps they must take to bring down the prices of prescription drugs in the United States to match the lowest price offered in other developed nations. There are now MFN deals with each of those leading pharmaceutical manufacturers. On September 30, 2025, President Trump announced the first agreement, with the drug manufacturer Pfizer, to bring MFN prices to American patients. On December 1, 2025, the Office of the United States Trade Representative, the Department of Commerce, and the Department of Health and Human Services announced an agreement with the United Kingdom (U.K.) that will increase the net price of new prescription drugs by 25% in the U.K., helping ensure they pay their fair share for innovative medicines. On December 19, 2025, President Trump announced nine new agreements with major pharmaceutical companies. On February 5, 2026, President Trump launched TrumpRx.gov , where patients can access large discounts on many of the most popular and highest-priced medicines in the country, paying prices in line with the MFN price. As of today, August 31, the Administration now has agreements with Pfizer, Astra Zeneca, EMD Serono, Eli Lilly, Novo Nordisk, Amgen, Bristol Myers Squibb, Boehringer Ingelheim, Genentech, Gilead Sciences, GSK, Merck, Novartis, Sanofi, Johnson & Johnson, AbbVie, Regeneron, Alcon, Astellas Pharma, BeOne Medicines, BridgeBio, CSL, Kyowa Kirin, Sun Pharma, Teva Pharmaceuticals, and UCB. President Trump is calling on Congress to enact the Great Healthcare Plan , a comprehensive plan to lower drug prices, lower insurance premiums, hold big insurance companies accountable, and maximize price transparency. Source: Fact Sheet: President Donald J. Trump Announces Deal with Nine Additional Pharmaceutical Manufacturers to Lower Drug Prices for Americans – The White House
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