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Overall RVF risk areas shown in red for the period September 2006-May 2007 with human case locations depicted by blue and yellow dots. Blue dots indicate areas of RVF human case locations that were mapped to be within the risk areas (red) and within the potential epizootic area (green). Yellow dots represent human case locations outside the risk areas; 64% of all human cases fell within the areas mapped to be at risk to RVF activity during this period.
