More on masks 1/26/21

I agree with Europe: Wearing medical-grade masks will be important to slow the spread of the B.1.1.7 strain. We have consistent evidence that single-layer cloth masks are not as effective as surgical masks, and N95 or KN95 masks are even better. https://t.co/LtwxVVdETz

— Atul Gawande (@Atul_Gawande) January 21, 2021

See https://t.co/jJMuQjXQxy for @Smogdr's excellent data on masks. Shows that adding filter layer hugely improves performance. Washing degrades it. Visit website to see other combinations. Totally consistent with all other results I've seen, including from my lab. pic.twitter.com/oEiJNLQNF1

— Linsey Marr (@linseymarr) January 25, 2021

Masks are everywhere, but which is best to wear to protect yourself from Covid-19?

CNN checked with experts about the pros and cons of the many masks on the market today and which may be best for you. https://t.co/KThzZ6Wdtp

— CNN (@CNN) January 26, 2021