“Researchers created a test to determine which masks are the least effective” By Alaa Elassar, CNN
N95 respirators and surgical masks worked best, “Folded bandanas and knitted masks also performed poorly and did not offer much protection.”
“Researchers created a test to determine which masks are the least effective” By Alaa Elassar, CNN
N95 respirators and surgical masks worked best, “Folded bandanas and knitted masks also performed poorly and did not offer much protection.”