{"version":"1.0","type":"rich","title":"ILINet Flu Surveillance Data","description":"This visualization displays national ILI (influenza-like illness) total cases across the years 2015–2019, with each year’s weekly curve plotted as a distinct line. The chart uses a line mark with year encoded as color, revealing seasonal patterns and year-over-year comparisons, such as the peak in 2018 and the extended 2019 season. Built with the vega-lite-api, it aggregates weekly data by summing ILITOTAL per week and year, then renders via Vega-Lite and Vega. The color scale is unordered, making it harder to discern temporal ordering. Data originates from CDC FluView, fetched as CSV via d3.csv.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"","width":960,"height":500,"cache_age":3600}