This chart traces the cumulative number of COVID-19 cases over time using Johns Hopkins data, rendering a single line with a linear y-axis. Built with React and D3 v5, it uses `svg` for output, `scaleTime` and `scaleLinear` for axes, and `line` to generate the path. The view initially loads recovered-case data, then swaps to death totals after two seconds, with optional marker lines for reference.