kcarruthers on Nostr: Oh really? Schools cut #covid-19 sick days by 20 per cent using HEPA air filters: ...

Oh really? Schools cut #covid-19 sick days by 20 per cent using HEPA air filters: Placing HEPA air filters into classrooms in the Bradford area of the UK reduced the number of covid-19-related absences among students by more than 20 per cent

https://www.newscientist.com/article/2398713-schools-cut-covid-19-sick-days-by-20-per-cent-using-hepa-air-filters/