A line chart titled “Coronavirus” displays the cumulative global death count from the COVID-19 time series, using the latest date column from the JHU CSSE data. The example fetches the CSV via `d3.csv`, maps each row’s last date value to a number, and reduces the array with a sum accumulator. It then formats the total with `d3.format(',' )` and displays the result as a large-text message in a `<pre>` element. No actual line geometry is drawn; instead, the visualization conveys the single data point through typography.