This interactive line chart visualizes global COVID-19 cumulative deaths over time, with each country represented by a gray line. Hovering over a point highlights the corresponding country’s full trajectory and displays a tooltip with the country name, death count, and date. The visualization uses React for state management, d3.scaleLog and d3.scaleTime for axes, d3.line for path generation, and d3.Delaunay-based Voronoi overlay for hover detection. Data comes from the CSSE COVID-19 time series CSV, rendered as SVG with custom axis labels and tick marks.