FDA expands Pfizer COVID booster, opens extra dose to age 16
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 The U.S. is expanding COVID-19 boosters, ruling that 16- and 17-year-olds can get a third dose of Pfizer’s vaccine. The U.S. and many other nations already were urging adults to get…