Updated 10 hours ago L.A. County To Require Masks Indoors For All As Delta Strain Of COVID-19 Surges “This is an all-hands-on-deck moment," the county's health officer said. Even vaccinated residents are required to mask up indoors again. Los Angeles County said Thursday that residents will be required to wear masks indoors once more, regardless of vaccination status, amid the spread of the highly contagious delta variant of COVID-19. The new ordinance will go into effect late Saturday night and comes just a month after California dropped most restrictions for vaccinated people and restarted its economy. “We’re not where we need to be for the millions at risk of infection here in Los Angeles County, and waiting to do something will be too late given what we’re seeing now,” Dr. Muntu Davis, the county’s health officer, said during a news briefing. “This is an all-hands-on-deck moment.”