Six additional cases of infection with influenza A H7N9 virus and one death were confirmed by Chinese health officials. The World Health Organization said the recent cases involved patients ages 28 to 78 who were exposed to poultry, and a 65-year-old man previously reported with the illness has died. The source of the infection is still under investigation, but health officials said there was no evidence of human-to-human transmission of the virus.

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