This chart shows how much of a no-brainer masks are. They *could* single-handedly stop the epidemic. pic.twitter.com/3A75kvCk16— Tomas Pueyo (@tomaspueyo) April 23, 2020
This chart shows how much of a no-brainer masks are. They *could* single-handedly stop the epidemic. pic.twitter.com/3A75kvCk16