This choropleth map visualizes the distribution of disease outbreaks across the United States, with state-level shading indicating the total number of reported illnesses. The map uses a linear color scale from white to pink to encode illness counts, with darker shades representing higher numbers. Built with React and D3 v5, the visualization employs `d3.geoAlbers` and `d3.geoPath` to render U.S. state boundaries from TopoJSON data, while illness totals are aggregated from the CDC’s National Outbreak Reporting System via CSV. Graticules and sphere outlines provide geographic context.