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Photograph / Copyright USGS
Reported detection of West Nile virus in Mosquitoes in the USA during 2006. Accessed from the USGS website.

"These maps reflect information for the 2006 West Nile Virus reporting season that has been submitted and verified to CDC through the week of May 1, 2007. These are the final USGS West Nile maps for the 2006 season." (W184.May08.w26)