The first map shows the world distribution of the Japanese Encephalitis virus serocomplex of the virus family Flaviviridae in 2000 (from CDC). The following maps illustrate the spread of WNV across the USA between 2000 and 2007. The last map shows the approximate world distribution of West Nile virus in 2007 (from CDC).

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N.B.  PLEASE VIEW THE SOURCE WEBSITES

The USA maps may be found through the websites of the National Wildlife Health Center or USGS; these websites should be consulted before referencing or utilising these maps as there are several caveats regarding these data, and they may alter with time and adjustment of laboratory results. The acknowledgements and credits, and contact information for the data on these maps is recognised on the National Wildlife Health Center and USGS websites and the pages linked to this site.