This choropleth map visualizes HIV/AIDS prevalence rates for the year 2017 across countries, with each nation colored on a yellow-orange-red sequential scale according to the percentage of the population aged 15-49 infected. Country boundaries are drawn using d3.geoPath with a geoNaturalEarth1 projection, while graticules and sphere outlines provide geographic context. Data is loaded from the IHME CSV via d3.csv, and country codes are matched to join prevalence values to map features. Gray indicates missing data for countries without reported statistics.