This example plots the global cumulative death toll from COVID-19 over time using a React component. The chart displays a black line on a white background, with red marker lines indicating the current date and the three-million-death threshold, while gridlines and axis labels are styled via CSS. The visualization uses React to manage the SVG rendering, while D3 v5 provides the time and linear scales, axis generation (`axisBottom`), line interpolation, and CSV data loading from the Johns Hopkins University repository, with date parsing and reduction over daily columns.