This choropleth map visualizes COVID-19 statistics by country, allowing users to switch between confirmed cases, deaths, and recoveries via a dropdown menu. Country boundaries are rendered with `d3.geoPath` using Natural Earth projection, while circle symbols sized by `d3.scaleSqrt` represent the selected metric at each country’s centroid. Data is loaded from a CSV file and merged with TopoJSON world geometry, with color and size legends providing context. Interactive zooming is enabled through `d3.zoom`.