This interactive parallel coordinates plot visualizes COVID-19 case data across six quantitative dimensions—total cases, deaths, recovered, active cases, tests, and population—using D3.js in React. Each line represents a country, colored by total deaths, with a cyan-on-navy color scheme and screen blending for overplotting. Users can brush along any axis to filter the data; brushed intervals persist across axes, and the polylines fade smoothly (500ms) to show only rows within all active selections. The visualization supports dynamic brushing interactions, enabling exploratory analysis of multi-dimensional relationships in the dataset.