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this post was submitted on 08 Feb 2024
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There were actual studies done and that kind of mask (aka "hospital masks") are more effective at reducing transmission when worn by the person who is sick than by when worn by other people, with the best protection (naturally) achieved when both wear a mask.
(Note that doctors also use masks during surgery and when seeing immuno-compromised patients, so that theory of yours immediatly jumps out as at best incomplete even without knowing about these studies)
There are masks with a much higher protection level which are much better at personal protection (not really meant to protect others from you), such as the PF1, PF2 and so on, but that's not what we're talking about here.
So the previous poster was entirelly right.
Looking at the upvotes/downvotes here it's surprising how fast people seem to have forgotten this kind of information that was circulating widelly during peak COVID pandemic times.