This chart displays cumulative COVID-19 deaths over time for each country, with a log-scaled y-axis to accommodate wide variation in totals. A Voronoi overlay built with `d3.Delaunay` and `d3.voronoi` enables hovering anywhere near a data point to highlight that country’s entire line and show its latest death count, date, and name in a tooltip. Data comes from the Johns Hopkins Coronavirus dataset, rendered as SVG paths using React and D3’s `scaleTime`, `scaleLog`, and `line` generators.