Figure 2From: The spatial epidemiology and clinical features of reported cases of La Crosse Virus infection in West Virginia from 2003 to 2007 Spatial clustering of La Crosse virus infection risk at the county and census tract levels in children 15 years and younger. These maps show the significant high-risk clusters for La Crosse virus infection in West Virginia at the county (A) and at the census tract levels (B) detected by Kulldorff's Spatial Scan Statistic. RR = relative risk.Back to article page