Study: N95 masks with exhalation valves do not work
11 Nov, 2020 | 09:20h | UTCCommentary: N95 Masks With Exhalation Valves Don’t Slow The Spread Of Covid-19 – Forbes
Commentary on Twitter
N95 ??with valves don't workhttps://t.co/qGZIEzE1Sh @AIP_Publishing today pic.twitter.com/mI9pVmFtfa
— Eric Topol (@EricTopol) November 10, 2020