Scientists worry virus variant may push up US COVID cases

FILE - Fans storm the court at the conclusion of a college basketball game in Champaign, Ill., on Sunday, March 6, 2022. After about two months of falling COVID-19 cases, pandemic restrictions have been lifted across the U.S., and many people are taking off their masks and returning to indoor spaces. (AP Photo/Michael Allio)

With coronavirus cases rising in parts of Europe and Asia, scientists worry that an extra-contagious version of the omicron variant may soon push cases up in the United States too.