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  1. 19th August 2020 18:57

    Thread: The face mask discussion

    by Billy
    Replies
    1,024
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    184,347

    Re: The face mask discussion

    Low-cost measurement of facemask efficacy for filtering expelled droplets during speech

    https://advances.sciencemag.org/content/early/2020/08/07/sciadv.abd3083


    Abstract
    Mandates for mask use...
  2. 21st May 2020 09:48

    Thread: The face mask discussion

    by Billy
    Replies
    1,024
    Views
    184,347

    Re: The face mask discussion

    To wear a mask or not to wear a mask, that is the question ?
    Dr. Shiva gives his opinion. (You can skip the first self promotion 10 mins if you wish)

    7LUDjfoUZpA

    PS. I am a builder to trade...
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