Mask Facts - AAPS | Association of American Physicians and ...
Sep 26, 2020·Medical masks — 44%, 3M Vflex 9105 N95 — 0.1%; 3M 9320 N95 — <0.01%; Cloth masks resulted in significantly higher rates of infection than medical masks, and also performed worse than the control arm some of whom may have worn masks. The virus may survive on the surface of the face masks