Experts fear increase in COVID-19 cases as Americans return home from holiday travel

CHICAGO, ILLINOIS - DECEMBER 23: Travelers pass through O'Hare International Airport on December 23, 2020 in Chicago, Illinois. According to AAA, an estimated 2.94 million people are expected to travel by air in the U.S. over the holidays from Dec. 23 through Jan. 3, which is a 59.9 percent drop from last year. (Photo by Scott Olson/Getty Images)