A medical worker monitors a H7N9 bird flu patient at the Wuhan Medical Treatment Centre. Photo: AP

WHO urges China to watch for sustained spread of H7N9 among humans

Virus has mainly been passed by birds, but fears grow of more human-to-human transmission

Topic |   H7N9

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A medical worker monitors a H7N9 bird flu patient at the Wuhan Medical Treatment Centre. Photo: AP
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