Question Do masks help stop the wearer from catching Covid-19 ?

Jul 2, 2020
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Masks help reduce the chances that the wearer will catch covid-19

A US Navy and CDC study of the USS Roosevelt crew that was infected with covid-19 showed that only 55% of those wearing masks caught covid-19 while 80% not wearing masks caught covid-19. Why is this self protection info about masks not being promoted as a reason to wear masks ?

There is other useful info in the study


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