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

Masking during the COVID-19 pandemic – An update of the evidence, National Collaborating Centre for Environmental Health

California to lift mask mandate in indoor public places - Los Angeles Times

What the science says about lifting mask mandates

Mask Mandate: San Francisco Bay Area health officials issue indoor mask mandate, regardless of vaccination status - ABC7 San Francisco

California easing COVID-19 mask recommendations - Los Angeles Times

Does Science Support Lifting School Mask Mandates?

Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus

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

When — and where — is it safe to stop wearing a mask? Experts weigh in : Shots - Health News : NPR

Face Masks and Prevention of Respiratory Viral Infections: An Overview - Aerosol and Air Quality Research

Coronavirus Updates: Covid-19: C.D.C. Guidance Prompts Caution in Some States - The New York Times

Face masks during the COVID-19 pandemic - SciLine

Stores Requiring Masks: Walmart, Kohls, Target, Starbucks

How to make a non-medical coronavirus face mask – no sewing required, Coronavirus