Fig. 1
From: Revealing new tick-borne encephalitis virus foci by screening antibodies in sheep milk
TBE prevalence in Örebro County and Sweden. a Number of TBE cases reported from 2004 through 2019 in Örebro County (red) and in all counties in Sweden (black). b Reported location of human TBE cases in Örebro County during 2009–2018, indicated by red dots. The cases are confined to four geographical clusters close to lakes: lake Hjälmaren (east); lake Vättern (south); lake Skagern and lake Toften (south-west); and in the northern part of the County where there are many small lakes (Råsvalen, Fåsjön and Norasjön). The clusters are circled in red (dotted lines). c Trend analysis of TBE incidence in Örebro County and in Sweden during the period 2004–2019. Joinpoint regression model (Joinpoint trend analysis software [28]) was used to analyse the incidence trends. The average annual percental change (AAPC) was calculated using 95% confidence interval (P < 0.05)