Schools cut covid-19 sick days by 20 per cent using HEPA air filters

The eagerly awaited finding comes from the first randomised trial of putting HEPA filter machines into classrooms

SINSIN
Oct 21, 2023 - 01:00
 0  3
Schools cut covid-19 sick days by 20 per cent using HEPA air filters
The eagerly awaited finding comes from the first randomised trial of putting HEPA filter machines into classrooms

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