Figure 2.

The temporal (time-line) distribution of the first positive results detected during WNV surveillance and the time of the first West Nile human cases in 2018. (a) The first positive results obtained during WNV surveillance and the first reported cases of human West Nile infection in 2018 are represented by symbols per district level. The top seven districts represent the Vojvodina Province, followed by the other districts of central Serbia are sorted in alphabetical order; (b) the time of the first positive results in horses, mosquitoes, and birds obtained during surveillance in 2018 concerning the time of the first human cases is shown. The red line represents the time when the first human case was detected per district level, and positive findings are presented in 2-week intervals periods in columns before and after the first human case was detected. Only the districts where human cases were detected are presented.