This choropleth map visualizes the share of the population infected with HIV/AIDS for the year 2017, using a sequential yellow-orange-red color scale to encode prevalence rates across countries. Gray marks indicate missing data. The visualization combines React state management with D3 utilities, including `d3.geoNaturalEarth1` for the map projection, `d3.geoPath` for rendering SVG paths, and `d3.scaleSequential` with `interpolateYlOrRd` for color encoding. Country boundaries and graticules are drawn from TopoJSON data, while prevalence values come from the IHME dataset.