407 Straight from NIH - Facemasks are ineffective to block transmission of vial infections and have devastating long term consequences (wearethene.ws) posted 3 years ago by 50_stars_for_freedom 3 years ago by 50_stars_for_freedom +407 / -0 40 comments share 40 comments share save hide report block hide replies
The CDC mostly agrees.
https://www.cdc.gov/mmwr/volumes/70/wr/mm7010e3.htm