Source: Travis Fain, WRAL, 8/31/21


A recent study out of Canada shows wide disparities in the effectiveness of different types of masks and suggests ventilation improvements can do better than common cloth and surgical masks in reducing transmission of COVID-19. University of Waterloo researchers used a sealed room, a masked mannequin and atomized olive oil to simulate breathing in their study. They used lasers to measure the aerosols, tiny particles that can float in the air, getting past masks and circulating in the room. Then they added ventilation, courtesy of an air purifier equipped with the sort of high-powered HEPA filters used in labs and on airplanes.

For more of this story, click here.