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 Monday. … Andrew Noymer, a UC Irvine [associate] professor of population health and disease prevention, said public health professionals assumed the new strain was already present in the area. The “only thing surprising is it took until now” to be detected, he said. “We’ve known for weeks the same strain was in San Diego and L.A. And if it’s in San Diego and L.A., then do the math. It’s here,” he said.