Fork of ILINet Flu Surveillance Data
This line chart tracks total ILI flu cases in the US per week, with individual curves for each year from 2015 to 2019, using an ordered color scale where darker shades indicate more recent years. Built with the vega-lite-api and d3.csv to load CDC FluView data, the visualization aggregates ILITOTAL by year, region, and week before encoding week on the x-axis, case totals on the y-axis, and year as an ordinal color field. The result enables direct year-over-year comparisons, highlighting seasonal peaks and variations without interaction.
AI-generated descriptionThis variant of the original work by Yu Zhang demonstrates use of an ordered color encoding for an ordered field (year), which makes it easier to read the chart, because you can say "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