by Carla K. Johnson and Mike Stobbe

People wear face masks as they ride an escalator at the Hong Kong International Airport in Hong Kong, Tuesday, Jan. 21, 2020. Face masks sold out and temperature checks at airports and train stations became the new norm as China strove Tuesday to control the outbreak of a new coronavirus that has reached four other countries and territories and threatens to spread further during the Lunar New Year travel rush. (AP Photo/Ng Han Guan)

A U .S. citizen who recently returned from a trip to central China has been diagnosed with the new virus that has sparked an outbreak and stringent monitoring around the world.

The man returned to the Seattle area in the middle of last week after travel ing to the Wuhan area, where the outbreak began. The man is in his 30s and is in good condition at a hospital in Everett, outside Seattle.

The U.S. is the fifth country to report seeing the illness, following China, Thailand, Japan, and South Korea.

Late last week, U.S. health officials began screening passengers from central China at U.S. airports. Officials around the world have implemented similar airport screenings in hopes of containing the virus during the busy Lunar New Year travel season.

Last month, doctors began seeing a new type of viral pneumonia—fever, cough, difficulty breathing—in people who spent time at a food market in Wuhan. More than 275 cases of the newly identified coronavirus have been confirmed in China, most of them in Wuhan, according to the World Health Organization.

The count includes six deaths—all in China, most of them age 60 or older, including at least some who had a previous medical condition.

Officials have said it probably spread from animals to people, but this week Chinese officials said they’ve concluded it also can spread from person to person.

In announcing the airport screenings last week, CDC officials said then risk to the American public was low but that it was likely the illness would appear in the U.S. at some point.