US Geological Survey
U.s. Geological Survey: Education: Disease Maps
Disease maps that trace the incidence of West Nile virus, encephalitis and dengue fever across the United States and its territories demonstrate one of the many uses of geography.
![Centers for Disease Control: Infectious Diseases Cards: West Nile Virus [Pdf] Handout](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Centers for Disease Control: Infectious Diseases Cards: West Nile Virus [Pdf] Handout")
Centers for Disease Control and Prevention
Centers for Disease Control: Infectious Diseases Cards: West Nile Virus [Pdf]
A fact card on West Nile virus answers questions about what causes it and how to protect against it.