The patient, a 41-year-old migrant worker from neighboring Sichuan Province, was diagnosed on April 3 and is in quarantine at Tibet's Third People's Hospital in Lhasa, the regional health and family planning commission said on its website.

The man had been involved in the trade of live poultry since arriving in Lhasa in February.

His symptoms were reported to the regional disease prevention and control center on April 2, and his condition was confirmed on 3 April. He is the first human infection of H7N9 bird flu in Tibet.

Following the diagnosis, live poultry trading has been suspended across the region. All those who had been in close contact with the patient are under medical observation.

H7N9 is a bird flu strain first reported to have infected humans in China in March 2013. Infections are most likely to strike in winter and spring.

Meanwhile, two new cases of H7N9 infection were also reported from 31 March to 6 April in central China's Hunan Province, health authorities said Saturday.

Live poultry trading has been suspended in the provincial capital Changsha since 17 March, which will last until the end of April.

Nationwide, 79 people died in January from the virus, according to the National Health and Family Planning Commission.

H7N9 is a bird flu strain first reported to have infected humans in China in March 2013. Infections are most likely occur in winter and spring.

Disease control and prevention experts have said that the H7N9 virus is not transmitted from person to person.

Experts recommend that people avoid contact with dead and live poultry, and only buy poultry with quarantine certificates.