A stall selling live poultry is closed at a market in Nanjing, capital of east China's Jiangsu Province, April 12, 2013. To prevent the transmission of the H7N9 virus, various actions have been taken recently in Nanjing, including suspending live poultry deals, killing live poultry and holding publicity campaigns. As of Thursday evening, China had reported a total of 38 H7N9 cases including 10 fatalities. (Xinhua/Li Mangmang)

A citizen reads bird flu prevention leaflets at a residential area in Nanjing, capital of east China's Jiangsu Province, April 12, 2013. To prevent the transmission of the H7N9 virus, various actions have been taken recently in Nanjing, including suspending live poultry deals, killing live poultry and holding publicity campaigns. As of Thursday evening, China had reported a total of 38 H7N9 cases including 10 fatalities. (Xinhua/Li Mangmang)

A stall selling live poultry is closed at a market in Nanjing, capital of east China's Jiangsu Province, April 12, 2013. To prevent the transmission of the H7N9 virus, various actions have been taken recently in Nanjing, including suspending live poultry deals, killing live poultry and holding publicity campaigns. As of Thursday evening, China had reported a total of 38 H7N9 cases including 10 fatalities. (Xinhua/Li Mangmang)