“…This apparent paradox can be observed in Brazil through the spatial distribution of seroprevalence of dengue virus infections: in some cities, the risk is high both in neighborhoods with more favorable socioeconomic conditions and in those with precarious living conditions 20,21,22 , while in other cities the poorest population has been hit more heavily 14,26,27 . In one Brazilian city, the risk of dengue virus infection, even among residents of the same neighborhood, was higher among those living in nonvertical buildings 26 .…”