Nate Silver @NateSilver538
@youyanggu @COVID19Tracking Yeah, it's tricky. Ideally, we'd know more about who is getting tested. We built a toy model for some of this stuff here. I think clearly when there's a very rapid increase in testing (e.g. the US in March), you're better off looking at the + rate... https://t.co/VK7rCgBNMc — PolitiTweet.org