This chart shows the global cumulative death toll from COVID-19 over time, with black reference lines highlighting the moment the total reached 5,000,000 and the most recent date in the dataset. The SVG line chart uses D3’s `scaleTime` and `scaleLinear` to map dates and death totals, with a custom `line` generator. React renders the chart, while the data is fetched from a CSSEGISandData GitHub CSV and aggregated by summing daily death counts.