Effectiveness of Ad26.COV2.S Vaccine Stable for Six Months

TUESDAY, March 22, 2022 (HealthDay News) -- The vaccine effectiveness (VE) of Ad26.COV2.S was stable over six months, including during a period of delta variant predominance, according to a study published online March 17 in JAMA Network Open.
Jennifer M. Polinski, Sc.D., M.P.H., from Aetion Inc. in New York City, and colleagues examined the association between receipt of Ad26.COV2.S vaccine and COVID-19-related infections and hospitalizations before and during the delta variant surge. Data were included for 422,034 vaccinated individuals and 1,645,397 matched unvaccinated individuals. Data were obtained from March 1, 2020, through Aug. 31, 2021.
The researchers found that VE was 76 percent for COVID-19 infections and 81 percent for COVID-19-related hospitalizations. VE was stable over calendar time and for at least 180 days after vaccination. VE during June to August 2021 was 74 and 81 percent for infections and hospitalizations, respectively, among states with high delta variant incidence. Higher VE for COVID-19 was seen for individuals younger than 65 years (78 percent), while VE was lower for immunocompromised individuals (64 percent). All estimates were corrected for underrecording of vaccination.
"As the COVID-19 pandemic continues and variants evolve, the observed VE may change as new variants emerge," the authors write. "Recent data have shown that a second dose will further improve protection."
Several authors disclosed financial ties to health care technology and pharmaceutical companies, including Janssen, which manufactures the Ad26.COV2.S vaccine and funded the study.
Related Posts
EPA Proposes Tougher Rules on Air Pollution
MONDAY, Jan. 9, 2023 (HealthDay News) -- For the first time in a decade, the...
Los cigarrillos mentolados quizá enganchen a los fumadores jóvenes más rápido, según un estudio
MIÉRCOLES, 8 de junio de 2022 (HealthDay News) -- Mientras la Administración de...
New Malaria Treatment Gets First Approval for Use in Children
MONDAY, March 14, 2022 (HealthDay News) -- A new drug that can cure a certain...
Dr. Anthony Fauci Will Step Down in December
MONDAY, Aug. 22, 2022 (HealthDay News) -- Anthony Fauci, M.D., who has advised...