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News From the Centers for Disease Control and Prevention
November 17, 1999

Update: West Nile Virus Encephalitis—New York, 1999

JAMA. 1999;282(19):1806-1807. doi:10.1001/jama.282.19.1806

MMWR. 1999;48:944-950

1 figure omitted

The West Nile virus (WNV) encephalitis outbreak continues to wane in the Northeast with the onset of cooler temperatures and continued vector-control operations. This report updates the progress of the ongoing investigation. Since the last published update,1 five additional domestic human cases and one international case have been identified. As of October 19, 56 (31 confirmed and 25 probable) cases of WNV infection have been identified, including seven deaths. The date of onset of the latest cases was September 22. The international case was a Canadian citizen who had visited the New York City (NYC) area in late August who had onset of fatal encephalitis on September 5. Active surveillance for human encephalitis cases in Connecticut and New Jersey has not detected any WNV cases.

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