This area chart shows the relationship between total COVID-19 deaths (x-axis) and total cases (y-axis) using D3.js v5. The visualization uses `d3.area()` with `curveBasis` to draw a filled path beneath the curve, rendered as an SVG. The data is loaded from a CSV file via `d3.csv()` from a GitHub gist. Axes are generated with `d3.axisBottom()` and `d3.axisLeft()`, with tick formatting using `d3.format()`. The chart includes labeled axes and gridlines, with the area filled in a dark purple color.