Figure 6From: Using geographic information systems and spatial and space-time scan statistics for a population-based risk analysis of the 2002 equine West Nile epidemic in six contiguous regions of TexasHigh-risk cumulative spatio-temporal clusters of equine WNV illness reported from six contiguous Health Service Regions in Texas in 2002; maximum cluster size was defined as 5% of the population at risk.Back to article page