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How N95 masks work

In efforts to reduce further spread of the virus, the US is set to distribute millions of free N95 masks across the country. Aaron Steckelberg and Bonnie Berkowitz for The Washington Post illustrated how the masks work. Early in the pandemic, N95 masks were hard to get. My wife, who is a healthcare worker, described how she and her colleagues would have to reuse N95 masks and store them in...

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