A booster shot of the Pfizer-BioNTech COVID-19 vaccine is recommended six months after initial vaccination for a number of groups, a Centers for Disease Control and Prevention advisory committee said Thursday. People 65 and older, those who live in long-term care facilities and adults 50 to 64with underlying medical conditions should receive booster shots, the Advisory Committee on Immunization Practices said. People 18 to 49 with underlying medical conditions should receive a booster shot "based on individual benefit and risk," the panel said. The panel voted downa measure recommending adults 18 to 64 who work in or are in settings that put them at high risk of exposure receive booster shots "based on individual benefit and risk." The panel did not vote on the issue of mixing boosters – for example, if a person who initially received the Moderna or Johnson & Johnson vaccine could receive a Pfizer booster shot. #boostershot #coronavirus