China has two new cases of humans infected with bird flu, bringing the total to 51, state media reported Sunday. The patients in Hunan province tested positive for the H7N9 virus, according to Xinhua news agency. The virus is normally found in birds and was never known to infect people until last month. A day before the announcement, the World Health Organization said China had been infected with a new variation of bird flu. The agency said it continued to look for the source of the infection. Of the total cases, at least 11 people have died, according to a report of CNN. On Saturday, the world body announced five new cases in Shanghai and the surrounding region, where most of the infections have been located. Those new patients range in age from 38 to 77, WHO said.
