This example displays cumulative COVID-19 deaths over time for multiple countries as a multi-series line chart using a log scale. A Voronoi overlay facilitates mouse interaction by partitioning the chart into regions nearest each data point. The visualization is built with React and D3 v5, using d3-scale for axes and d3-delaunay for the Voronoi diagram. Data comes from the Johns Hopkins Coronavirus dataset, rendered as SVG paths with hover events logging interactions.