This choropleth map displays the global prevalence of HIV/AIDS among adults aged 15-49 for the year 2019, using a yellow-orange-red sequential color scale to indicate infection rates. Countries without data render in gray. The visualization is built with React and D3 v7, using `geoNaturalEarth1` projection, `geoPath` for country boundaries, and `geoGraticule` for the map grid. Data is loaded from a CSV file containing prevalence statistics, matched to country codes via an ISO-3166 dataset.