Figure 5From: Human and entomological surveillance of West Nile fever, dengue and chikungunya in Veneto Region, Italy, 2010-2012 Relationship between vector index and human cases reported in the 15 days following the record of a WNV positive trap in 2012. The day of the onset of symptoms and the day of donation were considered for WNF/WNND and donors, respectively. When human cases are reported in the absence of mosquito positivity, a vector index = 0 in the closest trap in the previous two week has been reported.Back to article page