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 distribute them at cost. And encourage their use.
If something is 10 times less effective, it’s basically not even effective in comparison to what’s possible.
If something is 10 times less effective, it’s basically not even effective in comparison to what’s possible.