Researchers say the masks can provide protection from COVID while eating or drinking but doctors aren't so sure.
Still Confused About Masks? Here's the Science Behind How Face Masks Prevent Coronavirus
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What are the latest rules for face coverings and masks?
Will one-way masking protect you from COVID in public spaces? : Goats and Soda : NPR
Mask Up: Stop the spread of COVID-19
Would You Wear a Nose Mask?, A coronavirus-protection mask that just covers the nose was developed by scientists in Mexico. Immunologist Gustavo Acosta says his invention provides, By Inside Edition
原来这就才叫爱情??_哔哩哔哩_bilibili
What Are Nose Masks?
Masks Are Required For Sick Visits
COVID-19 Q&A: Masks are an important tool to protect against disease
To Shave or Not to Shave: How to Correctly Wear a Mask If You Have a Beard or a Mustache, Plus, Where to Find Masks That Fit Right
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