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 actual pdf is a nice looking document to print, too.