A choropleth map of global HIV/AIDS prevalence in 2017, using a yellow-orange-red sequential color scale to show the share of the population aged 15-49 infected. The visualization renders country boundaries as SVG paths using `d3.geoPath` with a Natural Earth projection, with gray fill for countries lacking data. It joins CSV data to country geometries via ISO numeric codes, using `d3.scaleSequential` and `interpolateYlOrRd` for color encoding. Built with React and D3 v5, the map also displays graticules and interior borders.