Pfizer vaccine for teens is effective against Delta for up to 4 months

Embargoed until: Publicly released: 2022-03-04 03:00

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Two doses of Pfizer's COVID-19 vaccine remain safe and effective against the Delta strain of COVID for up to 4 months, according to US research. The study showed that two doses of the vaccine had high efficacy against both symptomatic and asymptomatic infections. However, the study was conducted prior to the emergence of Omicron when Delta was the dominant strain.

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conference: JAMA Network Open

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Organisation/s: Yale School of Medicine, USA

Funder: This work was supported in part by the National Institutes of Health/National Institute of Allergy and Infectious Diseases grant K23AI159518 to Dr Oliveira and grants UL1TR001863 and KL2TR001862 to Dr Shapiro from the National Center for Advancing Translational Science. This work was also supported in part by Fast Grant from Emergent Ventures at the Mercatus Center at George Mason University (Dr Grubaugh), the US Centers for Disease Control and Prevention Broad Agency Announcement No. 75D30120C09570 (Dr Grubaugh), and the Connecticut Department of Public Health Contract No. 21PSX0049 (Yale Center for Genome Analysis).

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