This map visualizes confirmed COVID-19 cases per country as of September 25, 2020, using a sequential color scale applied to a natural Earth projection. It loads country boundaries from the `world-atlas` TopoJSON and case data from a TSV file, then renders each country as an SVG path with a fill color derived from the case count. Hovering highlights a country in red and reveals a tooltip with total cases, deaths, and cases from the last 14 days. The implementation uses d3's `geoPath`, `scaleOrdinal`, and `schemeSpectral`, with custom zoom and interactive color legend controls.