This chart displays cumulative COVID-19 deaths over time for each country, with a hover interaction that reveals the date, death count, and country name while highlighting the corresponding line. The visualization uses a log-scaled y-axis and a Voronoi overlay, built with d3.Delaunay, to detect the nearest data point for mouse events. Data comes from the Johns Hopkins Coronavirus Dataset, and SVG rendering is managed through React components with D3 scales and axes.