Q&A: H7N9 bird flu

By James Gallagher
Health and science reporter, BBC News

image copyrightAFP

A new type of flu has made the jump from birds to people in China - it is known as H7N9.

The World Health Organization says it as an "unusually dangerous virus", but it is still too soon to say whether it will pose a global threat to human health.

image copyrightAP
image captionThe new H7N9 influenza virus

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