The Medical City Clinic - While masks with valves are designed to ease exhalation and decrease humidity for the wearer, they do not block transmission of COVID-19 because they allow exhaled air
![Shocker! The Coronavirus-Fueled Celebrity Face Mask Selfie Trend Is Maybe a Little Misinformed | Vanity Fair Shocker! The Coronavirus-Fueled Celebrity Face Mask Selfie Trend Is Maybe a Little Misinformed | Vanity Fair](https://media.vanityfair.com/photos/5e5d63f19f4dd300088c15cd/master/pass/medical-masks-celebrity-selfies.jpg)
Shocker! The Coronavirus-Fueled Celebrity Face Mask Selfie Trend Is Maybe a Little Misinformed | Vanity Fair
![Mayo Clinic wants patients and visitors to switch masks - Post Bulletin | Rochester Minnesota news, weather, sports Mayo Clinic wants patients and visitors to switch masks - Post Bulletin | Rochester Minnesota news, weather, sports](https://cdn.forumcomm.com/dims4/default/62b801c/2147483647/strip/true/crop/1140x554+0+79/resize/1440x700!/quality/90/?url=https%3A%2F%2Ffcc-cue-exports-brightspot.s3.us-west-2.amazonaws.com%2Fpostbulletin%2Fbinary%2F391614af88553f94a89732a04d47516d_binary_6469653.jpg)