This visualization shows the trend of confirmed COVID-19 cases in Massachusetts from February to September 2020, plotted as individual circles on a time-series scatterplot using React and D3 v5. The SVG chart uses `scaleTime` for the x-axis and `scaleLinear` for the y-axis, with custom `AxisBottom` and `AxisLeft` components rendering ticks and labels. Data is loaded asynchronously via `d3.csv` from a GitHub gist, with the y-axis formatted in compact notation and tooltips showing the month via the native SVG `<title>` element.