Novavax announced that it submitted an application to the FDA for Emergency Use Authorization (EUA) of its protein-based COVID-19 Vaccine, Adjuvanted for active immunization to prevent coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as a homologous and heterologous booster in adults aged 18 and older.
"It's important for people to have a choice as they evaluate how to stay protected against COVID-19, and boosters are an invaluable tool to build upon immunity obtained from previous vaccinations," said Stanley C. Erck, President and Chief Executive Officer, Novavax. "Based on the data presented to the FDA's VRBPAC and the CDC ACIP, we believe our vaccine offers a broad, long-lasting immune response against a range of variants."
This application for EUA is supported by data from Novavax' Phase 3 PREVENT-19 trial conducted in the United States and Mexico, and from the UK-sponsored COV-BOOST Phase 2 trial. As part of an open-label booster phase of the PREVENT-19 trial, a single booster dose of the Novavax COVID-19 Vaccine, Adjuvanted was administered to healthy adult participants at least six months after their primary two-dose vaccination series of the Novavax COVID-19 Vaccine, Adjuvanted. The third dose produced robust antibody responses comparable to or exceeding levels associated with the efficacy data in the primary series Phase 3 clinical trials. In the COV-BOOST trial, the Novavax COVID-19 Vaccine, Adjuvanted induced a significant antibody response when used as a heterologous third booster dose.
In the PREVENT-19 trial, following the booster, local and systemic reactions had a median duration of approximately two days. Safety reporting of reactogenicity events showed an increasing incidence across all three doses of the Novavax COVID-19 Vaccine, Adjuvanted, reflecting the increased immunogenicity seen with a third dose. Medically attended adverse events, potentially immune-mediated medical conditions, and severe adverse events occurred infrequently following the booster dose.
In the U.S., the FDA granted EUA, followed by a positive recommendation from the U.S. Centers for Disease Control and Prevention's (CDC) Advisory Committee on Immunization Practices (ACIP), and endorsement from the CDC for a two-dose primary series in adults aged 18 and older in July. Doses of the Novavax COVID-19 Vaccine, Adjuvanted have been available for use in the U.S. since July.
This project has been supported in part with federal funds from the Department of Health and Human Services (HHS); the Administration for Strategic Preparedness and Response; Biomedical Advanced Research and Development Authority (BARDA), through the Department of Defense Joint Program Executive Office for Chemical, Biological, Radiological and Nuclear Defense (JPEO-CBRND) under contract number MCDC2011-001.
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