A middle-aged man who transported poultry for a living has died from a new strain of bird flu, the fourth death among 11 confirmed cases in China, AP quoted the government and state media as reporting Thursday. The 48-year-old man, who died in Shanghai, is one of several among the infected believed to have had direct contact with fowl, which may carry the virus. Until recently, the virus, known as H7N9, was not known to infect humans. It is not known how people are becoming sick with the virus, and health officials and scientists caution that there are no indications it can be transmitted from one person to another. Scientists who have studied the virus's genetic sequence said this week that the virus may have mutated, spreading more easily to other animals and potentially posing a bigger threat to humans.
