Inexpensive, accessible device provides visual proof that masks block droplets

ScienceDaily
Aug 11, 2020, 3:29 pm135 pts
In a proof-of-concept study, researchers report that a simple, low-cost technique provided visual proof that face masks are effective in reducing droplet emissions during normal wear. They found that the best face coverings were N95 masks without valves -- the hospital-grade coverings that are used by…

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