This visualization displays total COVID-19 cases per one million population for seven countries, comparing figures from March to September 2020 through a horizontal bar chart. A click on any bar triggers a d3-annotation label, with the U.S.A. example showing text and coordinates. Using D3 v7 with SVG rendering, the code employs `d3.scaleLinear` for the x-axis, `d3.scaleBand` for categorical country placement, and standard `d3.axisBottom`/`d3.axisLeft` axes, loading data from a local CSV file.