https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/types-of-masks.html?ACSTrackingID=USCDC_2067-DM73679&ACSTrackingLabel=Types%20of%20Masks%20and%20Respirators%20%20%7C%20COVID-19&deliveryName=USCDC_2067-DM73679 Published by Betty LaBua View all posts by Betty LaBua