
Changing Policies on COVID-19 Transmission
Despite its top-notch scientific institutions, the United States fared especially poorly during the COVID-19 pandemic. There were many missed opportunities that led to such an epic tragedy. One that has loomed especially large has been confusion around airborne spread of the virus. Precautions such as improving indoor air quality or wearing masks were ignored or downplayed until far too late. Linsey Marr, an engineer who studies aerosols at Virginia Tech, suddenly found her expertise needed in 2