FILE - A man holds a sign urging increased access to the monkeypox vaccine during a protest in San Francisco, July 18, 2022. U.S. health officials on Tuesday, August 9, 2022, authorized a new monkeypox vaccination strategy designed to stretch limited supplies by allowing health professionals to vaccinate up to five people — instead of one — with each vial. (AP Photo/Haven Daley, File)
FILE - Registered pharmacist Sapana Patel holds a bottle of Monkeypox vaccine at a Pop-Up Monkeypox vaccination site on Wednesday, Aug. 3, 2022, in West Hollywood, Calif. (AP Photo/Richard Vogel, File)
WASHINGTON — U.S. health officials on Tuesday authorized a plan to stretch the nation’s limited supply of monkeypox vaccine by giving people just one-fifth the usual dose, citing research suggesting that the reduced amount is about as effective.