Wearing a mask is useful
To prevent that, properly made cloth masks can catch the droplets that we spray unknowingly, and mounting research has established that face mask coverings can protect communities.
according to a study published in the journal PNAS. And while experts are still studying how effectively cloth-based masks filter the air around you, scientists believe a barrier between your nose, mouth and the air around you may reduce the amount of virus you're exposed to — if you're wearing it correctly, that is
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