A coronavirus variant that is thought to be more contagious was detected in the United States in Elbert County, Colo., not far from this testing site in Parker, Colo. The variant has been detected in several U.S. states.

DENVER, CO – DECEMBER 30: COVID Check Colorado site tester Bradford Christopher administers a COVID test at Echo Park Stadium on December 30, 2020 in Parker, Colorado. The site is one of the closest testing sites to Ebert County, where the first case of a person positive for a COVID-19 variant that is thought to be more contagious was detected in the United States. (Photo by Michael Ciaglo/Getty Images)