Using a combination of estimates based on cell phone movements and outbreak size, The New York Times shows how the coronavirus started with a few cases and then spread around the world.

The particle flows to represent travel volume from city to city is something else. NYT used a scrollytelling format that starts on a geographic map. You see a few points at first, the virus spreads, and then there’s a transition to an abstract view that looks like a subway map. You end up in the United States with a view of the current estimates.

Just look.

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Nathan Yau
http://flowingdata.com

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