This choropleth map visualizes the global share of the population infected with HIV/AIDS for the year 2017, using a yellow-to-red sequential color scale to encode prevalence rates. Countries with missing data appear in gray. The visualization is built with React and D3 v6, using `geoNaturalEarth1` and `geoPath` for map projection, `geoGraticule` for grid lines, and `topojson` to convert world atlas data into GeoJSON features. It renders as SVG, pulling HIV prevalence data from an IHME CSV dataset.