A Chinese man who was diagnosed with bird flu in June has recovered and been released from hospital, but where and how he picked up the virus is still a mystery, state media said yesterday.
The 31-year-old truck driver from Shenzhen, possibly contracted bird flu after visiting a poultry market in May, the official China Daily reported. But neither his wife, who bought a chicken there, nor the other family members who ate it fell sick, the paper said.
"This was a one-off case. Shenzhen is not a danger zone for bird flu," it quoted Jiang Hanping, head of the city's health department, as saying, adding there had been no other reports of the H5N1 strain of avian flu in Shenzhen.
The WHO said the case showed there were still poultry outbreaks that were not being detected.
"There have been several cases in China which have not had a directly identified source of infection, so it's not surprising," WHO spokesman Roy Wadia said.
When the man was first admitted to hospital, many of his internal organs had "showed signs of failure," and his lungs were severely infected, the official Xinhua news agency quoted the head of Donghu Hospital as saying. Treatment methods including using blood serum from previously recovered patients to fight the virus.