Are mask mandates returning to the Bay Area? Here's what each county says right now FacebookTwitterEmail A cashier helps a man check out while shopping at Rocky's Market in Oakland in June. Alameda County currently does not require vaccinated people to wear masks in most indoor settings — though many still do — but it is considering changes to its recommendations as the contagious delta variant spreads.Jessica Christian/The Chronicle Editor’s note: Since this story was published, seven Bay Area counties have changed their recommendations and now urge vaccinated people to wear masks indoors. Click here for the latest. On Thursday, Los Angeles County became the first in California to reimpose an indoor mask mandate that covers vaccinated as well as unvaccinated people. The mandate takes effect on Saturday night.