15K views · 175 reactions | Masks with valves do not stop the spread of the coronavirus and should not be used, according to the CDC: https://nbcnews.to/3iBD7iY Dr. John Torres explains. Tune in to NBC Nightly News with Lester Holt tonight for the latest on the pandemic. | NBC Nightly News with Tom Llamas | Facebook
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15K views · 175 reactions | Masks with valves do not stop the sprea…
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