Those face masks with breathing valves? They aren't effective, doctors say

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

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

      

July 23, 2020 at 09:02PM https://ift.tt/2CYkl6a https://ift.tt/32NBcDx