This is very wrong, to the point of being deliberately misleading: > Assume you take the app out grocery shopping with you and it subsequently alerts you of a

This is very wrong, to the point of being deliberately misleading: > Assume you take the app out grocery shopping with you and it subsequently alerts you of a contact. What should you do? It's not accurate enough for you to quarantine yourself for two weeks. And without ubiquitous, cheap, fast, and accurate testing, you can't confirm the app's diagnosis. So the alert is useless. YES, of course we need pervasive testing. Everyone knows we need pervasive testing. That's why it's called a "test and trace" regime! We don't have it, and that's a major problem. But we know we have to get there. And once we do, the alert isn't useless anymore. Tracing is one requirement of a successful mitigation strategy. Testing is the other. We need both. Having one side refuse to cooperate because they don't think the other will is just a recipe for disaster. I mean, imagine if the medical community started refusing to do tests because they thought the privacy folks would block attempts at tracing. That's what this logic amounts to.