To answer this question, we need to start by looking at the basics with @AmyMcKeever Here's what it does to the body (from February) https://on.natgeo.com/3g6I8z3  https://twitter.com/MarkPaulson7/status/1276560329640538114?s=20
Another long-term consequence: The infection itself.
As @LoisParshley reported for @NatGeo, some patients are having these kinds of relapses—sometimes weeks or months after they first got sick https://on.natgeo.com/2B4GCi7 
This recent analysis of 172 studies across 16 countries and six continents should do the trick.

It found the risk of infection/transmission when wearing a mask was 3% versus 17% when not wearing a mask. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31142-9/fulltext#.XvZjT_6wWr4.twitter https://twitter.com/NewsJunky72/status/1276560447957688321?s=20
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