The visualization displays COVID-19 infection counts across cantons in San José, Costa Rica, as a bar chart. It emphasizes which areas are most affected to encourage preventive behavior. Rendered as SVG with animation, the chart uses d3.csv to load data, d3.scaleBand and d3.scaleLinear for axes, and d3.axisLeft and d3.axisBottom for tick marks. On mouseenter, hovering triggers transitions and appends a dashed guideline via chart.append('line'), while text elements show value divergences; mouseleave removes these elements and restores opacity.