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Avian Influenza (Bird Flu)

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Definition

Avian influenza is flu infection in birds. The disease is of concern to humans, who have no immunity against it. The virus that causes this infection in birds can change (mutate) to infect humans. Such mutation could start a deadly worldwide epidemic.

Symptoms

Symptoms of avian flu infection in humans depend on the strain of virus. Infection with the H5N1 virus in humans causes more classic flu-like symptoms, which might include:

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