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This is like one of those things I mentioned where the data doesdoesn't back up the claim. I clicked through the link, read the source... and they say there isn't a lot of data and controlled experiments were limited (not done on a whole town or country or whatever)

They conclude the mask section with:

In theory, transmission should be reduced the most if both infected members and other contacts wear masks, but compliance in uninfected close contacts could be a problem (12,34). Proper use of face masks is essential because improper use might increase the risk for transmission (39). Thus, education on the proper use and disposal of used face masks, including hand hygiene, is also needed

How someone can read that and reach the conclusion that masks don't help reduce the rate of infection is strange to me. It is misinformation with a link to real information... and the real information doesn't back the claim. I see a lot of this going around twitter. I assume most people just aren't clicking through to review the sources

Unfortunately, medical issues have become politicized. It's like asking a physicist to calculate how beautiful a picture is.