Pfizer (NYSE: PFE) and BioNTech SE (Nasdaq: BNTX) have announced that the U.S. Food and Drug Administration’s (FDA) Vaccines and Related Biological Products Advisory Committee (VRBPAC) voted unanimously to recommend the FDA grant Emergency Use Authorization (EUA) for a booster dose of COMIRNATY (COVID-19 Vaccine, mRNA) in individuals 65 years of age and older and individuals at high risk of severe COVID-19.
The committee recommended that the additional dose be administered at least six months after the two-dose series. The panel also agreed that healthcare workers and others at high risk for occupational exposure should be included in this EUA.
VRBPAC based its recommendation on the totality of scientific evidence shared by the companies, including data from their clinical program evaluating the safety, tolerability and immunogenicity of a booster dose of COMIRNATY. A booster dose of the vaccine elicited significantly higher neutralizing antibody titers against the initial SARS-CoV-2 virus (wild type), as well as the Beta and Delta variants, when compared with the levels observed after the two-dose primary series. The reactogenicity profile within seven days after the booster dose was typically mild to moderate, and the frequency of reactions was similar to or lower than after dose two. The adverse event profile was generally consistent with other clinical safety data for COMIRNATY.
Real-world surveillance data also were presented to the VRBPAC by the Israel Ministry of Health, providing further support for the public health impact of boosters. The data presented from Israel included an analysis published this week in The New England Journal of Medicine. The analysis comprised approximately 1.1 million individuals ages 60 years and older who were eligible for a booster dose of the vaccine between July 30 through August 31, 2021. No new safety signals were observed, and reported adverse events were lower than those observed after dose two. The analysis showed that a booster dose restored very high levels of protection against COVID-19 infections and severe disease in this period when Delta was the dominant strain. Individuals who received the booster dose were less likely by a factor of 11.3 (95% CI: 10.4, 12.3) to develop a confirmed infection and less likely by a factor of 19.5 (95% CI: 12.9, 29.5) to develop severe illness compared to those who were previously fully vaccinated but did not receive a booster dose.
