Sun Yan (L), a doctor of Zhengzhou No.6 People's Hospital, receives the A/H1N1 influenza vaccination in Zhengzhou, capital of central China's Henan Province, October 31, 2009. A vaccination program against the A/H1N1 virus is kicked off in the province on Saturday. [Xinhua]

A police receives the A/H1N1 influenza vaccination at Zhengzhou No.6 People's Hospital in Zhengzhou, capital of central China's Henan Province, October 31, 2009. [Xinhua]