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[–] 23369025? ago 

While they don't stop airborne viruses they do stop the transfer of fluid getting through to your mouth and nose from sneezes and coughs. Would you rather have someone spit in your mouth or onto a cloth covering your mouth?

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[–] 23369156? 0 points 2 points (+2|-0) ago 

Depends. Who is doing the spitting?

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[–] 23369760? ago 

Haha. Valid point.