How many cases of West Nile encephalitis occurred in the U.S. last year?
A. Prior to August 1999, West Nile virus had never been reported in the U.S. In 1999, 61 cases of severe disease and 7 deaths occurred in the New York area. West Nile virus infections in Queens, NY, in 1999. No reliable estimates are available for the number of cases of West Nile encephalitis that occur worldwide.
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