It’s criminal to crowd people indoors anywhere w.o filtering the air, or ventilating properly. We’ve known that for over a year. [twitter.com]
Research at a hospital swamped by people with COVID-19 has confirmed that portable air filters effectively remove SARS-CoV-2 particles from the air
Real-world data show that filters clean COVID-causing virus from air
An inexpensive type of portable filter efficiently screened SARS-CoV-2 and other disease-causing organisms from hospital air.
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