Chinese premier stresses vigilance against H7N9 (4)

Chinese Premier Li Keqiang (C) attends a video meeting on the prevention and control of H7N9 virus in east China's Zhejiang Province and epidemic prevention after the Lushan Earthquake in southwest China's Sichuan Province, during his visit to the Chinese Center for Disease Control and Prevention (CDC), in Beijing, capital of China, April 28, 2013. Li urged authorities to be vigilant against the H7N9 avian flu virus and prepare themselves for any new developments. (Xinhua/Li Tao)