This interactive line chart displays cumulative coronavirus deaths over time for multiple countries using a log-scaled y-axis. A Voronoi overlay, built with `d3.Delaunay` and `d3.voronoi`, captures mouse hover events on any point along a country’s trajectory, highlighting that country’s full line in black. The chart renders SVG paths via React, with axes generated by D3’s `axisBottom` and `axisLeft`. Data comes from the Johns Hopkins COVID-19 time-series dataset.