This example visualizes global COVID-19 vaccination progress, plotting total vaccinations over time and colored by vaccine type, with tooltips revealing country ISO codes. Built using the Vega-Lite API for D3, the code registers Vega-Lite specifications with `vl.markPoint` and encodes the data through `vl.encode`. The visualization loads CSV data via `d3.csv`, applies a custom configuration for axis styling, and renders to an SVG canvas with interactive tooltips handled by the `vega-tooltip` `Handler`.