The Centers for Disease Control and Prevention is expected to announce Tuesday afternoon that the first case of Wuhan coronavirus has been reported in the U.S., CNN reported, citing a federal source. The virus, first identified in Wuhan, China, has killed six people and infected more than 300 people. CNN said a media briefing is scheduled for later Tuesday. U.S. stocks /zigman2/quotes/210599714/realtime SPX -3.37% dropped in the wake of the report. Also see: This is how far and fast the coronavirus has spread through U.S. stocks.