This choropleth map visualizes the global prevalence of HIV/AIDS among adults aged 15-49 in 2017, using a sequential yellow-to-red color scale to indicate infection rates. The map, rendered as an SVG with D3’s geoNaturalEarth1 projection and geoPath, uses the world-atlas TopoJSON dataset for country boundaries. Country fill colors are derived from CSV data on HIV prevalence, joined to map features via ISO country codes. The map includes graticules and interior borders, with missing data rendered in gray.