H7N9 avian flu

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 woman handles chickens at a market stall. Photo: Felix Wong

China poultry cull urged to halt spread of bird flu

A leading researcher has called for live-bird markets in H7N9-hit areas of the mainland to be closed and poultry culled to block the deadly virus' spread, as a study confirmed wet markets to be the "smoking gun" in the spread of the disease.