This bubble chart visualizes the prevalence of AIDS across six of the most-infected countries, plotting years on the x-axis, the number of individuals living with AIDS (in thousands) on the y-axis, and new diagnoses as bubble radius. The visualization uses D3.js v7 with SVG rendering, employing `d3.scaleLinear` for axes and bubble sizing, `d3.extent` for domain calculation, `d3.axisBottom` and `d3.axisLeft` for axes, and `d3.format` for number labeling. Data comes from the CORGIS AIDS dataset, provided by UNAIDS. The chart includes a legend for both bubble size and country-specific colors, with side scrolling required to view the full visualization.