This visualization maps the spread of COVID-19 from China to other countries using circles overlaid on a natural Earth projection. The size of each circle encodes population data from the source files, while arcs are attempted from longitude and latitude coordinates parsed from two CSV files. Built with D3 v5, it uses `geoPath`, `geoCentroid`, `scaleSqrt`, and `zoom` for interactivity, plus TopoJSON for country boundaries. The SVG rendering includes hover effects and a size legend.