This area chart displays the number of USA pandemic cases from 2013 to 2021, using a red filled area beneath a black line to emphasize the trend over time. The visualization is built with D3 v5, employing `scaleLinear` for both axes, `line` and `area` generators with `curveBasis` for smooth interpolation, and `axisBottom` and `axisLeft` for tick marks. Data is loaded from a CSV file hosted on GitHub, and the SVG rendering includes labeled axes for year and case counts.