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Questions in China on how H7N9 flu strain killed 2

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BEIJING (AP) — Health officials say they still don't understand how a lesser-known bird flu virus was able to kill two men and seriously sicken a woman in China, but that it's unlikely that it can spread easily among humans. Two men in Shanghai became the first known human fatalities from the H7N9 bird flu virus after contracting it in February. A woman in the eastern city of Chuzhou remains in...

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