Eighth bird flu outbreak in China China has conducted mass culls of birds in a bid to stem the virus China has confirmed a fresh outbreak of the lethal H5N1 strain of bird flu - the country's eighth within a month. The latest cases are in Jingshan county in Hubei province, indicating that the virus appears to be spreading. Prime Minister Wen Jiabao warned this week that the country was facing a "very serious situation". Four suspected human cases of the virus are being investigated, but so far there have been no confirmed human infections in China. Bird...