The US has its first confirmed case of a new virus that appeared in Wuhan, China last month, the US Centers for Disease Control and Prevention announced.

CDC officials said the US will be more strict about health screenings of airplane passengers arriving from Wuhan.

The patient, who is not being named, is in isolation at Providence Regional Medical Center in Everett, Washington. He is in his 30s and lives in Snohomish County, Washington, just north of Seattle. He had recently returned from Wuhan.

He arrived at Seattle-Tacoma International Airport on January 15, before any health screenings for the Wuhan coronavirus began at US airports. He sought medical care on January 19. The CDC and Washington state are now tracing the people he was in contact with to see if he might have spread the disease to someone else.