This choropleth map visualizes HIV/AIDS prevalence rates among adults aged 15-49 for 2017, using a sequential yellow-orange-red color scale applied to country polygons. The visualization pairs a React front end with D3 v5’s `geoEquirectangular` projection and `geoPath` to render SVG shapes, while `topojson` features and meshes define country boundaries and interiors. Data from the IHME dataset is joined to world atlas geometries via ISO country codes, with missing regions colored gray. The map includes graticules and a white sphere background for geographic context.