Biden Officials Now Expect Vulnerable Americans to Need Booster Shots


By BY SHARON LAFRANIERE
U.S.
https://ift.tt/2VcI37S
The growing consensus that at least some Americans will need a booster is tied in part to research suggesting that Pfizer’s vaccine is less effective after about six months.
New York Times
Vaccination and Immunization, Coronavirus (2019-nCoV), Clinical Trials
July 23, 2021 at 11:33PM

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