Image: West Nile virus cases in United States map- May 2003
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Description: Map showing states and counties where testing for West Nile virus was submitted to the CDC and locations of confirmed cases. May 21, 2004
Title: West Nile virus cases in United States map- May 2003
Credit: http://diseasemaps.usgs.gov/2003/images/us_human_map_week53.gif
Author: United States Geological Survey
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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