Bird flu deaths spark concern

China’s ministry of agriculture said the virus had been detected in pigeon samples. Four deaths occurred in Shanghai and 14 cases of infection were confirmed but there was no evidence of human to human transmission.

Dr Alan Hampson, chair of the Australian Influenza Specialist Group, said the reports were concerning.

“We don’t know whether we are seeing the tip of the iceberg or whether we’re actually seeing most of the existing cases presenting as severe