By eHow Health Editor
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The incubation period of avian influenza, or the amount of time that must pass between initial contact with the virus that causes the bird flu and the actual onset of symptoms, is not known. However, it is generally thought to be within one and five days of contact with the virus, so if you recognize symptoms shortly after having come into contact with birds, see your doctor as soon as possible. Read on to learn how to recognize symptoms of bird flu.
eHow Health Editor