Figure 1.

Spatial distribution of CWD in the United States and Canada. The CWD map is overlaid on a demographic map of the U.S. population. The insert map of New York State shows the Department of Environmental Conservation CWD Containment Area where the outbreak of CWD occurred. This depiction combines and updates information based on maps and data from the USGS National Wildlife Health Center [38], and census data from the US Census Bureau's interactive online mapping program for 2006 Population Estimates (US Census Bureau; 2006 Population Estimates; generated by Chris Reiber; using American FactFinder [39].).