This chart visualizes global COVID-19 death totals over time using a linear Y axis, with a black line path showing the cumulative deaths and gridlines from D3 axes. The example uses React and D3 v6, with `scaleTime`, `scaleLinear`, and `line` from d3 to generate the SVG path, while `axisBottom` and `axisLeft` render the tick marks. Data comes from the Johns Hopkins Coronavirus Dataset, loaded via `csv` and transformed with `timeParse`. Marker line components display a vertical reference at a specific date and a horizontal “1M” threshold.