Figure 2From: Human and entomological surveillance of West Nile fever, dengue and chikungunya in Veneto Region, Italy, 2010-2012 Algorithm for detection of possible cases of West Nile Fever, Veneto Region, since 2011. N, no; Y, Yes; WNND, West Nile neuroinvasive disease; neg, negative; pos, positive.Back to article page