Fork of ILINet Flu Surveillance Data
This fork of ILINet Flu Surveillance Data visualizes national influenza-like illness totals as line curves per year from 2015 to 2019, using an unordered color scale for the ordered year field, which hampers the ability to perceive trends like "darker is more recent." The chart aggregates weekly ILITOTAL values by year, region, and week, plotting them against the week of the year with d3.v5 for data loading via `csv` and vega-lite-api to build the mark and encoding specifications. The data originates from the CDC FluView Interactive, with the visualization running in a Vega-Lite framework with vega-tooltip for interaction support.