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Simple Test Shows Which Face Masks Are Best – WebMD

What masks do the best job? That would be N95 masks without valves, followed by surgical or polypropylene masks.



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FRIDAY, Aug. 7, 2020 (HealthDay News) — When it comes to face masks, not all are equally effective, a new study finds.
Duke University researchers developed a way of testing various types of masks to see which did the best job of stopping droplets coming from people’s mouths, preventing spread of the new coronavirus.
They relied on a makeshift apparatus consisting of a box, a laser, a lens and a cellphone camera.
“We confirmed that when people speak, small droplets get expelled, so disease…

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