Keywords: West Nile virus USA 2012.jpg Uploaded with en wp UW marker 2013 05 18 Reported cases of West Nile virus infection in the continental United States in 2012 http //www cdc gov/ncidod/dvbid/westnile/Mapsactivity/surv control12MapsAnybyState htm 2013-05-06 Centers for Disease Control and Prevention CDC West Nile virus PD-USGov |