This visualization displays a hierarchical tree of COVID-19 country measures, with nodes representing categories and subcategories of enforcement and implementation strategies. Text labels size inversely with depth, and curved links connect parent and child nodes. Built with React and D3 v5, it uses `d3.tree` for layout, `d3.linkHorizontal` for path generation, and `d3.zoom` for interactive panning. Data is loaded from a pipe-delimited CSV and converted into a tree structure using `d3.hierarchy`.