Centers for Disease Control and Prevention Director Rochelle Walensky went off script at a briefing Monday and made an emotional plea to Americans not to let up on public health measures amid fears of a fourth wave.

What they're saying: “I'm going to reflect on the recurring feeling I have of impending doom," Walensky said, appearing to hold back tears. "We do not have the luxury of inaction. For the health of our country, we must work together now to prevent a fourth surge."

The big picture: COVID-19 cases are rapidly rising in places including Michigan, New York, New Jersey and other Northeastern states, partially a result of variants of the virus becoming more widespread, experts say. An uptick in travel and states loosening restrictions are also factors. 

The 7-day daily average of new cases increased 10.6% from the previous week to 59,773, while the 7-day daily average of deaths increased 2.6% to 968.

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