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H7N9 avian flu

H7N9 refers to a subgroup of H7 influenza viruses that normally circulates among birds. Human infections of H7N9 have been reported in parts of China, with some people dying of severe pneumonia.

An H7N9 bird flu patient is treated in a hospital in Wuhan, Hubei province. Photo: AFP

Be serious about the bird flu outbreak

The region has become accustomed to news of sporadic outbreaks or isolated cases of bird flu, spread by wild birds to poultry and communicable to humans.