Fork of SANKEY Diagram for Spread of COVID-19
This interactive Sankey diagram visualizes the early global spread of COVID-19, tracing transmission from production hubs like China to countries worldwide. The D3 v5 visualization uses a custom `d3.sankey` layout, with SVG rendering and drag-and-drop node repositioning via `d3.drag`. Link thickness represents transmission values loaded from a JSON file, while node colors differentiate regions, illustrating how initial carriers in Asia led to secondary outbreaks across Europe, the Americas, and Africa.