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FILE - In this March 25, 2021, file photo Healthcare workers tend to people in cars at a drive up vaccination center at City College of San Francisco during the coronavirus pandemic. San Francisco will now require law enforcement in certain settings and other people in higher-risk workplaces to receive a coronavirus booster by Feb. 1, 2022, the city announced Wednesday, Dec. 29, as the omicron variant wreaks havoc across the country. (AP Photo/Jeff Chiu, File)