Gov. Gavin Newsom, speaking in an online conversation with Dr. Anthony Fauci, the nation's leading infectious disease expert, said the case was confirmed in Southern California Wednesday afternoon. During a Wednesday afternoon briefing, San Diego County Supervisor Nathan Fletcher said a 30-year-old man in the county with no travel history tested positive for the new strain on Tuesday. "Because there is no travel history, we believe this is not an isolated case in San Diego County," Fletcher said. He urged residents to stay at home for New Year's celebrations, citing the region's already strained healthcare system. On Tuesday, California reported Southern California's Intensive Care Unit availability is 0%.