Fig. 1From: First dengue virus seroprevalence study on Madeira Island after the 2012 outbreak indicates unreported dengue circulationGeographical distribution of the seroprevalence across Madeira Island. Districts with dengue seropositive study participants are shown in blue and the respective residences are marked with red dots. The map was created using QGIS 2.14.3 and the base layer data were obtained from DIVA GIS (http://www.diva-gis.org/gdata)Back to article page