US: Parents worried about Covid in schools have an easy weapon at hand, experts say — fresh air (Includes video)
CNN – August 19, 2021
Filtered or fresh air is not a substitute for masks and certainly no substitute for vaccination, but it’s another way to help protect people stuck indoors for hours from breathing in the virus, said Joseph Allen, who directs the Healthy Buildings Program at the Harvard T.H. Chan School of Public Health. “It is actually quite simple to improve the air quality inside classrooms,” added Allen, who has been advocating for better air ventilation in schools and other buildings as a way to control coronavirus spread since the pandemic started.
https://www.cnn.com/2021/08/19/health/schools-covid-fresh-air-wellness/index.html