RALEIGH, N.C. (WNCN) – Earlier this month, the CDC’s new guidance said two masks were better than one. UNC Chapel Hill scientists put that guidance to the test in their own labs. “I had my skepticism ...
(Reuters) - Making sure a mask fits snugly on the face and use of two masks is likely to significantly reduce a person's exposure to the coronavirus, laboratory experiments described by U.S. health ...
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