Chickens are seen in a farm in Zouping, east China’s Shandong Province, April 1, 2013. China has closed Shanghai’s live poultry markets as more birds are being culled to prevent the spread of a new bird flu virus. The live poultry markets in the Chinese city of Shanghai were shut down after authorities banned the trading of birds to prevent the spread of the H7N9 bird flu, which has claimed...