How will you know the masks work? | Hacker News

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		ALittleLight on March 21, 2020 \| parent \| context \| favorite \| on: Ask HN: What projects are you working on now? How will you know the masks work?

vbarta on March 22, 2020 [–]

Well, they don't (well, maybe a bit, if you believe the positive studies), but they're mandatory here - so, there's your market...

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