Physicist Explains Why Face Masks May Stop Spitballs But Can't Stop Covid
by admin - 2020-12-10 ( life / health / covid / vaccines ) [html version]
"At first, this spit-protection theory sounds valid enough; but give it two minutes of investigation and it quickly loses its credibility."
Read, listen or watch the rest here: muchadoaboutcorona.ca/spitballs/
blog version — similar posts here — ... and elsewhere
