16 March 2020
A few days ago I started seeing a chart floating around of cases of the coronavirus by country for each day starting on the day the country hit 100 cases. It struck me as odd to put the US on that chart next to, say, Italy because the US could get a similar number of cases with small outbreaks in a large number of cities that Italy had with huge outbreaks in a few cities. I found out that the source data had subnational data, so I started putting that chart on Twitter. There’s been enough interest that I’ve decided to make a live tracker1 with that visualization and others as I think of them. You can find that tracker here.