LOS ANGELES—An unidentified Los Angeles County resident was in isolation Dec. 3, recovering from what was confirmed as the county’s first case of the COVID-19 Omicron variant originally detected in South Africa. The Los Angeles County Department of Public Health confirmed the case late Thursday afternoon, saying the patient is a person who returned to Los Angeles after traveling to South Africa via London on Nov. 22. Health officials said the infection is “most likely travel-related.” The unidentified person is a fully vaccinated adult who lives in Los Angeles County, health officials said. The person is in isolation, with symptoms that “are improving without medical care.” A “small number” of close contacts in the Los Angeles area have been identified, and so far all have tested negative for the virus and none are showing any symptoms, officials said. The patient is the second known case of the variant in California. …