This choropleth map visualizes the geographic distribution of influenza cases across French regions for five weeks in late 2014. The colors, ranging from light purple to dark green, represent the cumulative number of cases per region for that period. Hovering over a region reveals its name and total case count. The map uses `d3.geo.conicConformal()` for projection and `d3.geo.path()` to render geographic boundaries from `carteFrance.json`. Data from `GrippeFrance2014.csv` is merged with the GeoJSON features, and a quantized color scale maps the summed values to the fill colors.