The H1N1 virus has spread to China killing a third person in the United States, state media reported on Monday.
Chinese officials are now searching for about 150 people who took the same flights as the 30-year-old man, first from Tokyo to Beijing and then from Beijing to the Sichuan provincial capital Chengdu.
The Government of China has already tracked down close to 150 people who may have come into contact with that man and have placed them in quarantine. None of those people have shown any flu symptoms yet.
For more information and updates on the H1N1 outbreak visit the World Health Organization website: http://www.who.int/en/
and the Center of Disease Control and Prevention website: http://www.cdc.gov/