This bubble chart visualizes the relationship between new COVID-19 cases, population density, and GDP per capita across multiple countries. Each circle represents a country, positioned along the x-axis by new cases and the y-axis by population density, with circle size encoding GDP per capita. Color distinguishes individual locations. The visualization uses D3 v7’s `scaleLinear`, `scaleSqrt`, and `scaleOrdinal` to map data dimensions, and an SVG-based tooltip displays detailed values on hover. Data is loaded from a CSV file, and the chart is rendered entirely with SVG elements.