S.F., several other Bay Area counties end indoor masking exemptions

San Francisco plans to temporarily tighten indoor masking requirements and expand settings where vaccines (and up-to-date boosters) are mandatory, officials announced on Wednesday, joining several other Bay Area counties in adjusting policy to the Covid-19 omicron variant. In San Francisco, officials are ending the exemption from the state's universal indoor masking requirement Dec. 15 that gave wiggle room for stable groups of fully vaccinated people in some settings, for at least one month beginning…