This line chart displays cumulative COVID-19 death totals for the top 20 countries over time, using a logarithmic y-axis. A Voronoi overlay, built with d3.Delaunay, enables hover detection on the closest data point, highlighting the corresponding country’s full time series in black. The visualization uses React for component structure, D3 scales and axes for rendering, and SVG for output. Data comes from the CSSEGISandData COVID-19 global time series CSV.