This visualization tracks COVID-19 cases and vaccination rates in the United States using a dual-axis scatter plot. Blue circles represent the proportion of the population vaccinated (partial or full), while gray circles show the seven-day average of new cases. The animation reveals trends over time, with annotations highlighting key milestones. Data comes from Our World in Data and the New York Times, rendered with D3 v7 (d3.scaleTime, d3.scaleLinear, d3.axisBottom, d3.axisLeft, d3.axisRight) and d3-svg-annotation. A menu lets users toggle between partial and fully vaccinated metrics.