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The authors wish to acknowledge the Natural Sciences and Engineering Research Council (NSERC) Canada for support through multiple grants to J.O

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Smoke particles are microscopic and highly stubborn

18 November 2010

N95 masks provide the greatest risk reduction, but a good cloth mask with a center filtering layer does still reduce risk substantially. That said, according to Ronaghi, smoke particles are one-30th the size of a single strand of hair and can easily slip through the gaps of a fabric face mask