1. 

   ahimsa Senior Member (Voting Rights)

   Messages:

   2,736

   Location:

   Oregon, USA

   Schools cut covid-19 sick days by 20 per cent using HEPA air filters
   
   https://www.newscientist.com/articl...k-days-by-20-per-cent-using-hepa-air-filters/
   
   (paywall, but first few sentences are visible)
   

    

   Last edited by a moderator: Oct 3, 2024

   ahimsa, Oct 21, 2023

   #1

   EzzieD, Wits_End, Hutan and 7 others like this.
2. 

   Sean Moderator Staff Member

   Messages:

   7,960

   Location:

   Australia

   Can't access the full article, but I hope they used a dummy filter arm as well. That would provide a clear answer either way.

    

   Sean, Oct 22, 2023

   #2

   alktipping, NelliePledge, shak8 and 2 others like this.
3. 

   Amw66 Senior Member (Voting Rights)

   Messages:

   6,749

   Air filtration works - who would have thought ?
   
   https://twitter.com/user/status/1840804187908477059
   

    

   Amw66, Oct 1, 2024

   #3

   mango, bobbler, Kitty and 1 other person like this.

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