Los Angeles County — America's most populous county — recently recommended mask wearing even for vaccinated people, just two weeks after the state relaxed most COVID restrictions. County officials say masks will help protect unvaccinated people from the more transmissible delta variant, which is spreading rapidly across the country.
CDC director Rochelle Walensky tells NPR the federal government may "encourage" states to return to more mitigation measures in places where vaccination is low and the delta variant is driving cases up.
That describes the situation in Missouri.
Rebecca Smith with member station
KBIA reports from Columbia.
Shalina Chatlani of the Gulf States Newsroom looks at the challenge of getting more people vaccinated in southern states.
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