China Bird Flu - Update
The Chinese National Health and Family Planning Commission notified WHO of an additional four laboratory-confirmed cases of human infection with avian influenza A(H7N9) virus from Jiangsu 1 (0) and Zhejiang 3 (0). No additional death has been reported.
Health officials raised further questions on Friday about the source of the new strain of bird flu infecting humans in China after data indicated that more than half of patients had had no contact with poultry.
The H7N9 virus has been found in 87 people, mostly in eastern China, and killed 17. But it is not clear how people are becoming infected and the World Health Organisation (WHO) says there is no evidence of the most worrying scenario - sustained transmission between people.
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