{"version":"1.0","type":"rich","title":"US Daily COVID-19 Vaccinations - Interactive Barchart","description":"A daily bar chart displays COVID-19 vaccination doses administered in Massachusetts from April to September 2021, using D3 v6 with SVG rendering and animated transitions. Each bar represents a day’s total doses, with hover tooltips showing the date and dose count. An interactive dropdown menu lets users select different US states, triggering smooth bar updates and axis rescaling via `scaleTime`, `scaleLinear`, `axisBottom`, and `axisLeft`. Data comes from a gist CSV containing state-level vaccination statistics. The chart uses `transition()`, `join()`, and mouse event handlers for interactivity.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/32dd78ca3b604a989206ed054a43f00f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}