Several Bay Area counties are considering mask mandates as delta variant threat grows FacebookTwitterEmail Gustavo Arellano, 36, who is vaccinated, wears a face mask as he fixes himself a plate at Taqueria El Sol buffet in Los Angeles. Masks are required for everyone indoors in Los Angeles County, and parts of the Bay Area are considering whether to follow suit.Damian Dovarganes/Associated Press Some Bay Area counties could order everyone to mask up again indoors, as new federal data underscores the threat of the delta variant — including that it could be more transmissible among vaccinated people than previously thought. Currently, eight of the nine Bay Area counties — along with the state of California — recommend, but do not mandate, that people mask up indoors, whether or not they are vaccinated. Only Solano County has not made this recommendation.