CDC officials made a breakthrough decision on masks. This is what convinced them.

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May 13, 2021 CDC officials made a breakthrough decision on masks. This is what convinced them. The Centers for Disease Control and Prevention's landmark decision to lift its mask mandate for fully vaccinated people was driven by numerous scientific studies that add to the evidence that the vaccines play a major role in curbing both infections and transmission of the virus. Read More Get the NBC News Mobile App Follow NBC News Check out all of NBCNEWS Newsletters here. Update Preferences | Unsubscribe | Contact | Privacy Update Preferences Unsubscribe Contact Privacy