‘Coronavirus case numbers are meaningless. Unless you know something about testing. And even then, it gets complicated.’ So wrote Nate Silver, statistician and founder of FiveThirtyEight, almost exactly a year ago. But do we know enough about testing? Coronavirus Case Counts Are Meaningless* *Unless you know something about testing. And even then, it gets complicated. In October, we explained in the Unstatistic of the Month why the 7-day incidence, which shows the developmen