Fig. 5From: Understanding the spread of infectious diseases in edge areas of hotspots: dengue epidemics in tropical metropolitan regionsDefinition of the 3 areas. The left is a schematic graph of incidence choropleth map, the darker the red it, the more confirmed cases, and vice versa. The right is a schematic graph for delimiting hotspot area, significant edge area, and non-significant edge areaBack to article page