SAN FRANCISCO -- Doctors say any mask is better than no mask, but cloth masks may not be getting the job done well enough against omicron. As cases surge, many are turning to N95 or KN95 masks to ...

This week marks five years since March 13, 2020, the day President Donald Trump declared a national state of emergency over ...

The authors reviewed existing evidence for filtration efficiency of cloth masks vs medical masks, and they found that cloth masks fared surprisingly well. Layers matter, as does the material used.

There is no question among scientists that wearing one mask is better than not having any mask at all at combating the coronavirus. But with a more contagious variant strain of the coronavirus ...

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