California State to loosen its mask mandate at end of day February 15 for vaccinated people, due to the 65% drop in infection rate since the peak of the winter surge caused by the omicron variant of the coronavirus, as well as stabilization in hospitalization numbers. This won't affect Los Angeles County, which plans to keep its own rules in place past the deadline. Lifting the indoor mask requirement in Los Angeles County will require the level of transmission to fall to the "moderate" level as defined by US Centers for Disease Control and Prevention, and stays there for two weeks straight, said Barbara Ferrer, the Los Angeles County Public Health Director.