Bars and nightclubs in San Francisco will require COVID-19 vaccinations or a negative COVID-19 test for customers as a effort to combat the spread of the Lineage B.1.617 Delta variant. (KPIX-TV) COVID-19 pandemic in the San Francisco Bay AreaCOVID-19 pandemic in CaliforniaCOVID-19 pandemic in the United StatesCOVID-19 pandemic link embed save