Mask mandates pour in nationwide after CDC revises guidance for vaccinated people

New mask mandates and rules cascaded Tuesday and Wednesday following Centers for Disease Control and Prevention (CDC) guidance that vaccinated people in high-transmission areas should still wear masks indoors, bringing back pandemic health restrictions for many Americans. 

"I have stuck with CDC guidance throughout the pandemic and today is no different," Kansas City, Mo., Mayor Quinton Lucas tweeted Tuesday night. "I will return Kansas City to a mask mandate indoors based upon national and regional health guidance and discussion with other Kansas City leaders."

He added: "We cannot ignore the rapid spread of the COVID-19 Delta variant in Missouri—outpacing much of the country. We will do all we can to ensure our corner of this state is safe."

With the rapid spread of the delta variant of the COVID-19 virus, some cities and counties, led by Los Angeles, brought back mask mandates in recent weeks. Some were also calling for the CDC to bring back its universal mask-wearing recommendation nationally.