> The question is whether you can get that without a huge false positive rate. My guess is that you can No, you can't. The virus spreads exponentially and the

> The question is whether you can get that without a huge false positive rate. My guess is that you can No, you can't. The virus spreads exponentially and the app is suppose to keep up. In other words, you get an exponential number of alarms. > On the cost issue, the obvious solution is to make testing free and easy Cost is not the limiting factor. Equipment, reagents and time is. We could have easily beaten the pandemic by now if simply going from door to door and taking a smear test was an option.