{"version":"1.0","type":"rich","title":"COVID-19 Stages","description":"A choropleth map of U.S. counties shows COVID-19 progression stages across six dates in March–April 2020. Each county’s color encodes a stage from none to contained, emergence, outbreak, slowdown, or contraction, with a dropdown to switch dates. The visualization uses Mapbox GL JS for interactive vector-tile rendering and D3’s `d3.csv` and `d3-dsv` to load and filter county-stage data from a remote GeoJSON and CSV. Hovering highlights county outlines via Mapbox feature-state updates.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/37003d78619e4a2c90ab18989e47fe5d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}