[Goose]

In any case, I sometimes fear there are people out there who are thinking "I weak a mask, so I can't spread COVID or get COVID". They then behave as if they are "protected". They aren't.

It would be interesting to see what the spread breakdown is from the group above vs the group that doesn't wear masks at all.  Guessing the difference isn't 25%.

I don't know if you are the over or under on that number, but that is certainly the right question. Unfortunately attempts to measure this haven't been real great so far. BC has pointed out one study, which yielded the 25% number. I do think it is clear the number isn't 80%, or it would be obvious by now. One problem with measuring it is that wearing the mask may not be the only, or even the primary, difference between the two groups.

[Goose]

In any case, I sometimes fear there are people out there who are thinking "I weak a mask, so I can't spread COVID or get COVID". They then behave as if they are "protected". They aren't.

It would be interesting to see what the spread breakdown is from the group above vs the group that doesn't wear masks at all.  Guessing the difference isn't 25%.

I don't know if you are the over or under on that number, but that is certainly the right question. Unfortunately attempts to measure this haven't been real great so far. BC has pointed out one study, which yielded the 25% number. I do think it is clear the number isn't 80%, or it would be obvious by now. One problem with measuring it is that wearing the mask may not be the only, or even the primary, difference between the two groups.