This paper shows that cloth masks, at least of the kind they used are significantly less effective than N95 masks, and the amount of the penetration of the material depends massively on the size of the droplets https://academic.oup.com/annweh/article/54/7/789/202744 … Any studies on typical COVID19 droplet size?
-
-
New study, basically the same information. If everyone wears a mask, we can greatly reduce the chance of transmission of the virus. If only 1/2 the people wear masks, the virus can still spread.
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

Another new study on mask wearing: but this time assuming R0 of 2.2 or 4, effectiveness against trans, & pop% wearing it. Good news is it works. Bad news: it needs high 95% effectiveness and also high 75% or more mask wearing compliance to get under R<1.