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Experts say some classrooms may need an air purifier — and offer advice on sizing - The Boston Globe
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Study shows: Air purifiers remove 90 percent of aerosols in school classrooms | Aktuelles aus der Goethe-Universität Frankfurt
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Ford DIY Air Filtration Kit That Reduces COVID-19 in the Air Validated by Peer-Reviewed Scientific Research Journal | Ford Media Center
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England could fit Covid air filters to all classrooms for half cost of royal yacht | Schools | The Guardian
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On A Back-To-School Supply List: Materials For DIY Air Purifiers : Back To School: Live Updates : NPR
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Air purifiers with HEPA filters in every classroom could help with COVID, bushfire smoke and asthma | UNSW Newsroom
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