COVID-19 has spurred investments in air filtration for K-12 schools, but technologies aren't an instant fix

The COVID-19 pandemic has brought increased attention to indoor air quality and the effect that ventilation has on reducing disease transmission in indoor spaces. A recent infrastructure survey reported that of the nearly 100,000 operating public school buildings across the U.S., more than a third have an immediate need for upgrades to the ventilation systems that help control indoor air quality and the spread of "aerosols."

source https://medicalxpress.com/news/2021-08-covid-spurred-investments-air-filtration.html