This line chart depicts the global cumulative death toll from COVID-19 over time, with a horizontal marker line at 10,000 deaths and a vertical marker at the most recent date. It uses React and D3 v5’s `scaleTime`, `scaleLinear`, and `line` to generate an SVG path from data fetched via `d3.csv` from the CSSEGISandData GitHub repository. The chart renders a single thick black line, with the marker lines and text labels styled via CSS.