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>> If the claim masks don't work didn't come from the same people who said isolating didn't work, I might take them seriously.

It didn't. The claim came from Cochrane group.

So, are you taking it seriously now?

Yes. And the reasonable criticisms of it too. And the people I'm referring to continue to misinterpret the claim to twist it to their own ends.

Individually masks reduce infections. En masse, even more so.