Those face masks with breathing valves? They aren't effective, doctors say https://ift.tt/2CYkl6a Amanda Morris, Arizona Republic

Some mask mandates banned the use of masks with breathing valves, because they don't stop the spread of coronavirus.

      

from USATODAY - News Top Stories
https://ift.tt/32NBcDx
July 24, 2020 at 01:32AM