DENVER – A Colorado man who became the first reported person in the U.S. to have a COVID-19 variant that is spreading in the United Kingdom hadn’t been traveling, health officials said Monday, triggering a host of questions about how the new strain showed up in the Rockies.Colorado officials were expected to provide more details at a news conference Wednesday about how the man in his 20s from a mostly rural area of rolling plains at the edge of the Denver metro area came down with the variant.For the moment, the variant is likely still rare in the U.S., but the lack of travel history in the first case means it is spreading, probably seeded by travelers from Britain in November or December, said scientist Trevor Bedford, who studies the.