China Increases Bird Flu Vigilance

GANGCHA COUNTY, CHINA - JANUARY 23: (CHINA OUT) Whooper Swans walk on ice of the Qinghaihu Lake at Garila Village January 23, 2007 in Gangcha County of Qinghai Province, China. Whooper Swans from Bayanbulak in northwest China's Xinjiang Uygur Autonomous Region spend winter at Qinghaihu Lake annually. According to state media, China has increased its vigilance against bird flu after cases of poultry and also human infections have been reported in Vietnam, Indonesia, Nigeria, the Republic of Korea and Japan. (Photo by China Photos/Getty Images)