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The spread of avian influenza, particularly the H5N1 strain, has occurred over several decades since its emergence in the late 1990s. Initial outbreaks were reported in Asia, and the virus gradually spread to Europe, Africa, and parts of the Americas over the years. The rate of spread can vary significantly depending on factors such as the virus strain, environmental conditions, and poultry trade practices. Overall, the timeline for its spread has been gradual, with peaks in outbreaks influenced by various ecological and human factors.

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AnswerBot

3w ago

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