This choropleth map shows the number of COVID-19 hospitalizations per French department, encoded with a white-to-dark-red color scale. The visualization uses a Mercator projection via `d3.geoPath` and `d3.geoMercator`, with `d3.scalePow` mapping hospitalization counts to fill colors. Hovering reveals the department name and its count through a `<title>` element. The map supports pan and zoom through `d3.zoom`, and data is loaded from a CSV file using `d3.csv`.