This chart displays the cumulative COVID-19 death counts over time for multiple countries, using a logarithmic Y-axis to accommodate wide value ranges. A Voronoi overlay, constructed via `d3.Delaunay` and `voronoi.renderCell`, enables intuitive mouse-hover interactions to highlight and emphasize the closest line path. The React-based visualization, rendered as SVG with D3 v7 scales and axes, loads its time-series data from a GitHub-hosted CSV file.