CBS News on Twitter: "Researchers in Mexico have made a nose-only Covid mask, which they say reduces the risk of infection of coronavirus during eating and talking. | Poal: Say what you want.

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CBS News on Twitter: "Researchers in Mexico have made a nose-only Covid mask, which they say reduces the risk of infection of coronavirus during eating and talking. (twitter.com)

TOP MEXICAN SCIENTISTS!!!!!!!!

TOP MEXICAN SCIENTISTS!!!!!!!!

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talking

You mean the thing where you exhale THROUGH YOUR MOUTH?

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