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Charting a moving case fatality rate

I made an attempt at charting a moving case fatality rate for covid cases in US states. Basically trying to convey the same information from this chart I made, but in a more direct way.

The result isn’t quite as straightforward or accurate as I would have hoped, so I’m definitely curious to get feedback, particularly from statisticians or epidemiologists.

(@Fil, I did end up using your array-blur instead of my own calculations—mine were much slower and I figured why reinvent the wheel?)