An H7N9 bird flu patient is treated in a hospital in Wuhan, Hubei province. A mutation of the strain has been found in Guangdong province. Photo: AFP

Mutation of H7N9 bird flu strain found in Guangdong patients

Samples taken from patients show genetic change but no sign of higher risk to humans

Topic |   H7N9 virus

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An H7N9 bird flu patient is treated in a hospital in Wuhan, Hubei province. A mutation of the strain has been found in Guangdong province. Photo: AFP
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