Researchers at Harvard University found ventilation systems filter out 99% of airborne viruses. If people follow mask protocols, too, their study says it's safer than grocery shopping or eating out.
CNN.com - RSS Channel - App Travel Section, CNN: Travel
Tue, 10/27/2020 - 6:28pm
Researchers at Harvard University found ventilation systems filter out 99% of airborne viruses. If people follow mask protocols, too, their study says it's safer than grocery shopping or eating out.