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Previous Volume 352:420-421 January 27, 2005 Number 4 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: West Nile virus is a flavivirus that has caused seasonal outbreaks of disease in humans since its introduction into the United States in 1999. The clinical presentation is highly variable, ranging from asymptomatic disease to mild influenza-like symptoms to permanent flaccid paralysis and death.¹ Study and clinical observation are complicated by the fact that areas hardest hit by the disease during one year may have only sporadic cases in the following years.

Colorado had 2943 reported cases of West Nile virus infection in 2003.² There was a spectrum of clinical presentations among patients hospitalized with the disease, . . . [Full Text of this Article]

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