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LHN's avatar

I bought and read A Song for a New Day in January of 2020. I don't think I've ever seen something go from speculative to current events that fast.

And while that future obviously had its bad points, I could wish we paid half as much attention to ventilation as they do.

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JOANN LAWLER's avatar

On re-use of KN95: I’ve seen different sources recommend 24, 48, or 72 hours between reusing a mask. Store it in a breathable container e.g. brown paper bag; have 3 or 4 masks and rotate among them daily.

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