Rich Davis, PhD, D(ABMM), MLS ๐Ÿฆ ๐Ÿ”ฌ๐Ÿงซ (@richdavisphd) Tweeted: 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. https://t.co/ETUD9DFmgU
tmm ๐ŸŒ’
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