This example visualizes COVID-19 confirmed cases for ten countries using a horizontal bar chart rendered as SVG with React and D3 v5. It shows each country's case count as a blue bar, with country labels on the y-axis and a linear scale on the x-axis. The code loads data from a CSV file via `d3.csv`, filters to the 22nd through 31st rows, and uses `scaleBand` and `scaleLinear` to map data to positions. React manages the component state and rendering, while D3 handles the scales and axis ticks. The visualization highlights the relative magnitude of cases across selected countries.