I do that because I read that the 1918 flu was transmitted via USMail.
Well I won’t go that far. It’s also tranmitted on money and a host of other possibilities. Go to a gym and use equipment everyones had their hands on. Eat at a restaraunt and you have no clue how many people have touched the food or plate before you get it. Check out in a grocery store line and the gal might have just returned from over seas.
Normally, I shy away from Quora articles, but the one has legit references: