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Why Didn't We Wear Masks for the Flu?
There was a concern that with the masks, this would create a situation where people are touching their face more. We didn't know whether COVID transmitted very well from surfaces or not. And we have now learned that both those things are wrong. The benefit of masking together is so large that it's totally swamped by the benefit of reducing the exhaled virus in the air and the inhaled virus for individuals.