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New science leads to another CDC update on masks. Even for the vaccinated.
CNN
You could almost hear the collective groan of frustration around the country Tuesday when the US Centers for Disease Control and Prevention again updated its guidance, encouraging more Americans and all schoolkids and teachers to wear face masks to stop the spread of Covid-19.
But the health community's understanding of the coronavirus, its variants and vaccine efficacy has evolved with the virus itself, and this new guidance is based on new information.More Related News