Better masks needed to stop virus spread

Thursday, August 19, 2021

The findings of a new study highlight a need for widespread use of better face masks and the importance of good ventilation to mitigate the spread of COVID-19 indoors.

Waterloo mechanical engineering researchers performed experiments using a mannequin to simulate a seated person breathing in a large room.

The studies showed a significant buildup over time of aerosol droplets – exhaled droplets so tiny they remain suspended and travel through the air – despite the use of common cloth and blue surgical masks.

“There is no question it is beneficial to wear any face covering, both for protection in close proximity and at a distance in a room,” said Serhiy Yarusevych, a professor of mechanical and mechatronics engineering and the leader of the study. “However, there is a very serious difference in the effectiveness of different masks when it comes to controlling aerosols.”

See Study supports widespread use of better masks to curb COVID-19 indoors for full story.

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