This chart displays cumulative COVID-19 death counts over time for multiple countries, using a logarithmic y-axis to accommodate wide numerical ranges. Each country is represented by a gray line. Hovering over any point on the chart, enabled by a Voronoi overlay for precise nearest-point detection, highlights the corresponding country's entire trajectory in red and displays a tooltip with the country name, death count, and exact date. The visualization is built with React and D3 v7, fetching data from a CSV file and rendering all elements as SVG.