The outbreak of the virus was first reported in December and has also struck Thailand, South Korea, and Japan. The first U.S. case of the virus was contracted by a Washington state man, who's not being named, after he traveled to China. The man got back to the U.S. on Jan. 15, passing through Seattle-Tacoma International Airport, and was hospitalized on Jan. 19. He's currently being kept in isolation at Providence Regional Medical Center in Everett, Washington. Officials have said that the infected man, who is in his 30s, is doing well and is "healthy," NPR reports.