This interactive bar chart displays total COVID-19 cases across ten countries for May 31st, using a vertical scale with country names and a horizontal linear scale for case counts. Built with React and D3 v5, the visualization renders SVG rectangles whose widths encode case numbers, with tooltips revealing exact values. Data comes from a CSV dataset loaded via D3's `csv` function, and the chart filters rows in `useData.js` to include only specified countries while sorting by location.