What does a mask do? Blocks respiratory droplets coming from your mouth and throat. Two simple demos: First, I sneezed, sang, talked & coughed toward an agar culture plate with or without a mask. Bacteria colonies show where droplets landed. A mask blocks virtually all of them. Twitter Link
Rich Davis, PhD, D(ABMM), MLS MicrobeMicroscopePetri dish @richdavisphd Jun 26 2020
Username below is not safe for children…. but the point is made, I think. Read More
