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For the Record - Sept. 17, 2008

West Nile virus: An article in Sunday’s California section on West Nile virus said that 20% of those infected get the most serious, neuro-invasive form of the disease. It should have said that about 20% of those infected develop flu-like symptoms, and about 1 in 150 develop the most serious form of the disease. Most people who are infected by the virus do not become ill.

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