The influenza A(H7N9) virus is one subgroup among the larger group of H7 viruses that normally circulate among birds. A number of human infections of the H7N9 virus have been reported in eastern China, mostly in the Yangtze River Delta region since late March 2013. Some of the patients have died of severe pneumonia brought on by the virus. 

A notice alongside empty cages says the poultry stalls at a Shanghai market are closed. Photo: AFP

Shanghai considers permanent ban on sale of live poultry

Authorities said yesterday the virus had claimed its eighth and ninth victims - an 83-year-old man from Suzhou , Jiangsu , who died a week after testing positive for the virus, and a 35-year-old woman from Chuzhou, Anhui.

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