4) Travel mask mandate should continue while awaiting CDC data, health officials' group says
Use and Care of Masks
It may be time to break out the masks against Covid, some experts say
Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus
When and Why to Wear a Mask
COVID-19 Information
Effectiveness of wearing face masks against traffic particles on the streets of Ho Chi Minh City, Vietnam - Environmental Science: Atmospheres (RSC Publishing) DOI:10.1039/D2EA00071G
Should You Wear a Mask? Unmasking Comes to Soon for Some Still Wary of Covid - Bloomberg
Face Masks Are Returning to Hospitals. What's Your Bay Area County Doing?
Masks On? What Employers Need to Know About Face Coverings at Work
COVID-19 Information
CDC says fully vaccinated Americans can go without masks outdoors, except in crowded settings - The Washington Post