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FDA expands Pfizer COVID booster, 3rd dose available for 16 and 17 years olds
FILE - A Pfizer COVID-19 vaccine booster shot is prepped to be administered at the Mount Sinai South Nassau Vaxmobile that visited Freeport High School, in Freeport, New York, on Tuesday, November 30, 2021. (Photo by Steve Pfost/Newsday RM via Getty WASHINGTON - The U.S.