Well, they *can* be effective...if worn properly (many don't) regularly cleaned to avoid other infections (many don't) and not overworn to cause respiratory problems of their own (many don't).
And I wouldn't rely on the WHO for anything regardless.
Fun to watch Fauci and journ-0-lists only wear a mask when the TV cameras are on — then immediately remove the mask - when they think the cameras are turned off.
12 posted on 07/03/2020 9:58:53 AM PDT by george76
(Ward Churchill : Fake Indian, Fake Scholarship, and Fake Art)