A scatter plot visualizes the rolling seven-day average of COVID-19 deaths across the United States over time, using data from the New York Times. The chart renders an SVG with small circles, a time-scale x-axis formatted by month and year, and a linear y-axis. It is built as a reusable chart function following the Towards Reusable Charts pattern, using D3 v6 APIs like `scaleTime`, `scaleLinear`, `axisBottom`, and `axisLeft`. Labels annotate the title, y-axis, and a vaccination milestone, with the source cited in the margin.