A pedestrian wears a face mask while walking past a sign at a vaccination center at City College of San Francisco during the coronavirus pandemic in San Francisco, Thursday, March 25, 2021. (AP Photo/Jeff Chiu) ** FILE **
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A pedestrian wears a face mask while walking past a sign at a vaccination center at City College of San Francisco during the coronavirus pandemic in San Francisco, Thursday, March 25, 2021. (AP Photo/Jeff Chiu) ** FILE **
