Governments around the world have begun to stress the importance of reducing the risk of indoor aerosol transmission, and are investing several billion dollars in federal funds to improve indoor air quality.

Common pollutants include volatile organic compounds (VOCs), indoor particulate matter, grease, and cooking affluents, as well as larger pollutants such as nitrogen dioxide (NO2) and carbon monoxide (CO). Additionally, mold, formaldehyde, and nitrogen oxides (NOx) are also on the radar.

Across Quebec, 90,000 CO₂ sensors have been installed in classrooms, while Belgium's "ventilation plan" requires CO₂ meters in every public room. Additionally, 300,000 CO₂ monitors have been purchased by schools so far, and classrooms are equipped with air purifiers, including CO₂ monitoring.