Keywords: West nile virus cases US 2002.jpg en Map showing states and counties where testing for West Nile virus was submitted to the CDC and locations of confirmed cases States shaded grey did not submit data 2012-09-05 07 39 29 http //diseasemaps usgs gov/2001/usa_human_mar_04 html United States Geological Survey PD-USGov Uploaded with UploadWizard West Nile virus |