This example presents a world map visualizing HIV-infected people per country using 2021 data from the World Bank. Countries are colored with a green sequential scale based on infection counts, with hover tooltips displaying exact values and a legend explaining the ranges. Users can zoom and pan the map via d3.zoom. The visualization uses d3.geoNaturalEarth1 and d3.geoPath for geographic rendering, with topojson-client to load country boundaries from the visionscarto-world-atlas.