Health and Science

CDC chief warns of another Covid surge as Americans travel for spring break

Key Points
  • The U.S. could see another surge in Covid cases as more Americans return to airports for spring break destinations, the head of the Centers for Disease Control and Prevention said Monday.
  • TSA screenings have topped 1 million every day since Thursday, the highest volumes in a year.
  • The CDC still cautions against nonessential travel, even for people who are fully vaccinated.
Passengers arrive for American Airlines flights at O'Hare International Airport on February 05, 2021 in Chicago, Illinois.
Scott Olson | Getty Images

The U.S. could still see another coronavirus surge — even as vaccinations against Covid-19 rapidly rise across the nation — as states relax restrictions and more Americans travel for spring break, the head of the Centers for Disease Control and Prevention warned Monday.

"With the coming warmer weather, I know it's tempting to want to relax and to let our guard down, particularly after a hard winter that sadly saw the highest level of cases and deaths during the pandemic so far," CDC Director Dr. Rochelle Walensky said at a press briefing.

The Transportation Security Administration, or TSA, screened more than 1.34 million people on Sunday, 86,000 more people than the same day a year ago just after the World Health Organization declared Covid-19 a pandemic.

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TSA screenings have topped 1 million every day since Thursday, the highest volumes in a year. While air travel is far short of 2019 levels, more Americans are returning to the skies despite guidance from the CDC warning against nonessential trips, even for those who are fully vaccinated.

Even though many colleges in the U.S. scaled back their spring breaks in an effort to curb partying and infections, top Biden administration officials are still worried about travelers who are "enjoying spring break festivities, maskless," Walensky said.

"I'm pleading with you, for the sake of our nation's health," Walensky said at the briefing Monday. "Cases climbed last spring, they climbed again in the summer, they will climb now if we stop taking precautions when we continue to get more and more people vaccinated."

Even with declining infections and a rapidly expanding vaccine rollout, the U.S. continues to report a dangerously high baseline of daily cases that could go higher if Americans let their guard down, top Biden health officials have warned. Some 37.5 million people in the U.S., about 11% of the population, are fully vaccinated so far, according to the CDC.

The U.S. has come a long way since early January, when it reached a peak of just over 250,000 daily new cases, based on a weekly average. The nation is now reporting a daily average of 53,670 new infections over the last week, a 10% decline compared with a week ago, according to a CNBC analysis of data compiled by Johns Hopkins University.

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— CNBC's Leslie Josephs and the Associated Press contributed to this report.