Japan has confirmed a case of the new coronavirus that has killed one person and infected dozens more in China.
Authorities said a 30-year-old man had tested positive after returning from the Chinese city of Wuhan.
He fell ill with a fever and cough on January 3 while in Wuhan, which was recently affected by an outbreak of pneumonia caused by the new virus.
The infection raises concerns before the holidays of the Chinese New Year, considered the largest annual movement of people in the world.
Coronaviruses are a family of viruses that cause diseases ranging from the common cold to more serious diseases.
In more severe cases, the infection can cause pneumonia, severe acute respiratory syndrome, kidney failure and even death.
Authorities said the man was taken to the hospital on January 6 after symptoms persisted when he returned to Kanagawa Prefecture, west of Tokyo.
The scans found signs of pneumonia and the tests found the same coronavirus as people affected by the Wuhan outbreak, health officials in Japan said.
The man, who according to the Kyodo news agency is Chinese, was now discharged from the hospital after his condition improved.
Authorities said his family and the medical staff who treated him have not become ill.
Officials in Wuhan said last week that a 61-year-old man was China’s first known death from the new coronavirus, which emerged in December.
At the beginning of January it had infected 44 people in China and 15 in Hong Kong.
Scientists are trying to determine the source of the disease.
It has been linked to a food market in the city, but authorities have said it is not SARS, which killed hundreds during an epidemic in 2002 and 2003.
They have said that the virus cannot be detected simply by passing or talking to someone infected.
However, the World Health Organization is concerned that it may spread and has warned hospitals around the world.
On Tuesday, he confirmed that a case of the coronavirus had been reported in a Chinese person in Thailand.
It is a particularly worrying time for the spread of the disease, as the Chinese New Year is approaching on January 25.
Millions of people in China have already started traveling for the celebration that is expected to last until February 18.
The Chinese government estimates that people make three billion trips to the 40-day festival.
The United States government has advised travelers to Wuhan to take precautions, while Chinese officials have urged people visiting or returning to the city to wear masks and seek medical attention if they develop a cough and fever.