A new study looks at how different types of face masks — from medical-grade to homemade — may reduce the spread of COVID-19.
FRIDAY, May 22, 2020 (HealthDay News) -- Face coverings may reduce the risk of transmitting COVID-19, a new study suggests.
Researchers assessed the effectiveness of seven types of face coverings -- including medical-grade and homemade masks -- when people breathed or coughed while standing or lying down. They were also tested using a dummy attached to a cough-simulating machine.
All face coverings without an outlet valve reduce the forward distance of a deep exhale by at least 90%, according to the study led by engineers at the University of Edinburgh in Scotland.