How to Put on and Remove a Face Mask - Disease Prevention and Control, San Francisco Department of Public Health

How to Put on and Remove a Face Mask - Disease Prevention and Control, San Francisco Department of Public Health

IJERPH, Free Full-Text

Face Masks in Child Care Programs California Childcare Health Program

A slew of states, cities and schools are ditching mask mandates this week. But the fate of one big mandate is still up in air

Face masks during the COVID-19 pandemic - Wikipedia

New CDC guidance: Is it really safe to remove your mask? - Los Angeles Times

Face masks required on BART

COMMENTARY: What can masks do? Part 1: The science behind COVID-19 protection

Infection Control Guidelines - Disease Prevention and Control, San Francisco Department of Public Health

4) Travel mask mandate should continue while awaiting CDC data, health officials' group says

Protecting Public Health During the COVID-19 Pandemic: PHI Response & Resources - Public Health Institute

COVID-19 Information

California easing COVID-19 mask recommendations - Los Angeles Times