I read one study that indicated an N95/KN95 mask was 10 times more effective than the regular (non) medical masks. I always thought it was unusual that the US government just didn’t mail KN95 masks to people, or widely…
I read one study that indicated an N95/KN95 mask was 10 times more effective than the regular (non) medical masks. I always thought it was unusual that the US government just didn’t mail KN95 masks to people, or widely…