ideas Test Positivity Is a Bad Way to Measure Covid’s Spread December 27, 20200 So why do policymakers keep using it? source:https://www.wired.com/story/test-positivity-is-a-bad-way-to-measure-covids-spread Post navigation Previous Article The Video Games WIRED Loved Most in 2020 Next Article The Biden Administration Needs a VP of Engineering, Not a CTO