This gem of yours is precious:
[These studies show hat masks are effective] “EVEN BY UNTRAINED, SLOPPY USERS I WOULD ASSUME”.
Yeah, and how would they study that? Care to tell me how they can control those variables, and how they did so?
You see science doesn’t work on your assumptions. In fact, it is supposed to eliminate them. You a faux expert with no actual medical knowledge. You embarrass yourself.
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