This line chart displays cumulative COVID-19 death counts over time for various countries, using a logarithmic y-axis to accommodate wide value ranges. A Voronoi overlay, built with `d3.Delaunay`, enables interactive hover detection, highlighting the nearest data point and displaying a tooltip with the country name, death total, and date. The visualization is rendered as an SVG using React and D3 v5, with the data sourced from the John Hopkins Coronavirus Dataset.