Example of how the purpose of masks for ordinary people is still not understood. The ones with exhalation valves, including N95s, should not be worn around people, period. Not just in sterile hospital operating rooms as NYT claims. Cotton mask>valved N95.https://www.nytimes.com/interactive/2020/health/coronavirus-best-face-masks.html …
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The 3M design pictured is the common design, and it will arrest the forward momentum of thw vast majority of droplets. Not ideal, I’ll grant you. But I would rather immunocompromised people wear an N95 valved mask (properly fitted) than a cloth mask. Good thread here: https://twitter.com/MasksForDocs/status/1240849802914496513 …
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Agree for infection control, but people should understand what they’re doing. Will work in an article explaining all this.
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