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Can air purifiers help stop coronavirus spread indoors? - Vox
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Real-world data show that filters clean COVID-causing virus from air
Research on HEPA filters and COVID is slim, but some experts are optimistic | CBC Radio
The best air purifiers in 2021 – tested | WIRED UK
How to Find a Portable Air Purifier to Help Reduce Exposure to COVID-19 Aerosols
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Air purifiers are being installed in schools to combat COVID — but do they work? - ABC News
Can an air purifier help protect you from COVID-19?
NEW Coway Double HEPA Filter: Filtering Viruses In The Air