US Expands Pfizer COVID Boosters, Opens Third Dose to Age 16

U.S. health authorities again expanded the nation’s booster campaign Thursday, opening extra doses of Pfizer’s COVID-19 vaccine to several million 16- and 17-year-olds. The U.S. and many other nations already were urging adults to get booster shots to pump up immunity that can wane months after vaccination, calls that intensified with the discovery of the […]

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