HEPA filters cut covid-19 sick days but we've been slow proving this

Covid-19 sick days were 20 per cent lower in schools with air-cleaning HEPA filter machines, researchers on an eagerly-awaited study have found. But why has it taken so long to discover how well they work, asks Clare Wilson

SINSIN
Nov 2, 2023 - 20:00
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HEPA filters cut covid-19 sick days but we've been slow proving this
Covid-19 sick days were 20 per cent lower in schools with air-cleaning HEPA filter machines, researchers on an eagerly-awaited study have found. But why has it taken so long to discover how well they work, asks Clare Wilson

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