A line chart displays global coronavirus deaths over time for multiple countries on a logarithmic y-scale, with a Voronoi overlay enabling mouse-based highlighting of the nearest data point and its corresponding country line. The chart uses React with D3 v5 scales and line generators, while the overlay leverages `d3.Delaunay` and `d3.voronoi` to compute cell regions for hover detection. Data comes from the Johns Hopkins Coronavirus dataset, rendered as SVG paths with axes and gridlines.