Chinese mainland's first confirmed A/H1N1 patient who was only identified by the family name Bao is in a stable condition, said a Chengdu Infectious Disease Hospital authority Monday.

Tian Ming, vice president of Chengdu Infectious Disease Hospital, said Bao's temperature had fallen back to normal.

Both Bao's father and his girlfriend, who had close contact with the patient, were isolated for medical observation at the same hospital. They didn't show abnormal symptoms, said Tian.

Bao, 30, who had been studying at an American university, arrived in Beijing on board the Northwest Airlines flight NW029 May 9, after making a transfer in Tokyo from St. Paul, Minnesota in the United States. His body temperature was normal when entering China. He then flew from Beijing to Chengdu on Sichuan Airlines flight 3U8882 the same day.

Bao was found to have a fever on the flight from Beijing to Chengdu accompanied by a sore throat, coughing, a stuffy nose and sneezing.

He went to the Sichuan People's Hospital after getting off the plane, and was tested "weakly positive" to A/H1N1 virus twice by the Sichuan Center for Disease Control and Prevention. He was then transferred to the Chengdu Infectious Disease Hospital.

Bao was the second confirmed case of A/H1N1 influenza in China. A 25-year-old male Mexican was confirmed on May 1 in Hong Kong to be infected with influenza A/H1N1, and those who were in close contact with him were put under quarantine in 19 mainland regions.

Editor: Yan