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How does West Nile virus cause illness in some people?

April 26, 2017cause illness people virus West Nile

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How does West Nile virus cause illness in some people?

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Once bitten by an infected mosquito, in a small number of cases, the West Nile virus multiplies in a person’s blood system, crosses the blood-brain barrier and enters the brain. The virus then interferes with the normal functioning of the central nervous system and causes swelling and inflammation of the brain tissue.