Figure 4

SaTScan and Local Moran's I Analyses for 2002 and 2003. Results of the SaTScan analyses at 1%, 2%, and 5% population thresholds overlain on the Local Moran's I analyses using 100 km, 300 km, 600 km, and 1000 km distance thresholds for 2002 and 2003. The Local Moran's I results can be interpreted as follows: high/similar are counties with high rates of human WNV incidence surrounded by counties that also show high rates of incidence, high/dissimilar are counties with high rates of human WNV incidence surrounded by counties that have low human WNV incidence, not significant are counties where there are not statistically high or low human WNV incidence levels, low/dissimilar are counties with low rates of human WNV incidence surrounded by counties that have high human WNV incidence, low/similar are counties with low rates of human WNV incidence surrounded by counties that also have low rates of incidence.