This actually looks like a pretty good idea:
I found it at This Is Wny I’m Broke, which I make a point of checking out from time to time.
The thing is, masks are annoying, one of the most annoying things about them being that we can’t see lips move when we are talking to each other. The Plague spreads best in confined spaces with prolonged social contact, which is also how a lot of chatting is done. So the temptation is to dump the mask just when it might make a real difference.