Home-made cloth face masks likely need a minimum of two layers, and preferably three, to prevent the dispersal of viral droplets from the nose and mouth that are associated with the spread of COVID-19, indicates a video case study published online in the journal Thorax.
Viral droplets are generated during coughing, sneezing,...
Homemade Face Masks Likely Need At Least 2 Layers To Curb COVID-19 Spread
Eurasia Review
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