SANTA ANA—A 21-year-old San Clemente man tested positive for the more contagious U.K. strain of COVID-19, marking the first known case in Orange County, local health officials announced Feb. 8. The man tested positive on Jan. 26 and “his symptoms have now resolved,” according to a memo sent Monday to the Board of Supervisors from Dr. Clayton Chau, director of the Orange County Health Care Agency and the county’s chief health officer. The man, whose name was withheld, has “no history of international travel” and “is not part of a larger outbreak,” Chau wrote. “We are trying to get his close contacts tested to see if they have evidence of infection.” The state Department of Public Health informed the Orange County Health Care Agency (HCA) over the weekend about the case, according to Chau, who said contact tracing indicates the man had recently been to Big Bear, where the strain …