charticulator.com/_gallery/polio.md

title	image	video	description	dataset	order
Polio Incidence Rates in the United States	/images/gallery/polio.png	/videos/gallery/polio.mp4	Polio incidence rates in the United States (Matrix view)	polio_united_states	14

This chart displays Polio incidence rates (number of cases per 100,000 people) for each American state. The chart is a heatmap where each cell represents the incidence rate for a given year and state. The color represents the incidence rate.

Based on a chart produced by the Wall Street Journal, http://graphics.wsj.com/infectious-diseases-and-vaccines/