Can you reuse a face mask? It won't be as effective if you do

Throw away disposable face masks after one use. If you absolutely have to reuse an old face mask, here's how to minimize the chances of infection.
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Air Pollution Safety: How to Clean and Store Your Mask Properly

With rising city pollution, protecting your lungs from PM2.5 and PM10 is vital. Experts advise using N95 or KN95 masks for ...