they aren't ruling out masks, they're sharing an anecdote that the mask shown in a screenshot (presumably this screenshot: https://image.cnbcfm.com/api/v1/image

they aren't ruling out masks, they're sharing an anecdote that the mask shown in a screenshot (presumably this screenshot: https://image.cnbcfm.com/api/v1/image/106422086-1583245914252coronavirusprotectionmaskebay.jpg?v=1583245945&w=900&h=506 https://image.cnbcfm.com/api/v1/image/106422086-158324591425...) isn't capable of filtering dust, let alone small pathogens.