This visualization shows a choropleth map of the United States colored by reported Zika virus cases from a 2016 dataset. Each state is filled with a sequential orange color scale using a log transform, so the fill reflects the relative case counts. Hovering over a state triggers a dark tooltip that displays the state name and its case total, while the state itself becomes slightly transparent. The map is rendered in SVG and animated states update as the data loads, with the color scale computed dynamically from the data range.