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Fork of ILINet Flu Surveillance Data

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Ffengliplatform
Last edited May 25, 2021
Created on May 25, 2021

This line chart displays annual U.S. ILI (influenza-like illness) total cases across weeks, with one multi-segment line per year from 2015 to 2019. The visualization aggregates weekly ILITOTAL values by year and region, using an unordered color scale for the year field, which complicates comparison. It is built with vega-lite-api, which wraps D3 v5 and Vega-Lite, loading CSV data from the CDC FluView Interactive via d3.csv. The chart uses tooltips to show year values on hover, and the code sets axis styling through a custom config object.

AI-generated description

This variant of the original work by Yu Zhang demonstrates improper use of an unordered color encoding for an ordered field (year), which makes it more difficult to read the chart, because you can't say anything like "darker is more recent".

A visualization constructed using the vega-lite-api.

This graph shows the national ILI total cases annually. The curves from 2015 to 2019 to the present date are displayed. This plot achieves the visualization of the annual ILI total patterns in general, and also provide a direct comparison year-over-year. We can tell 2018 is the year with highest Flu cases in mid February time, while 2019 has a more stretched Flu season comparing to other years.

When interations are introduced for the visualization together with Choropleths Map, we can select the individual yearly curve and present the map for that given year. We can also select a region or state and present a different portion of the dataset here to see more localized patterns.

See Data on Gist: ILINet Flu Surveillance Data

The original data comes from the CDC FluView Interactive

MIT Licensed

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