Good to know about the positive rate. The media has not been very forthcoming with actual data an usually only quotes wide numbers. What I meant is that is test alone will not do the job perfectly and that is what people expect. Higher false negative rates is what bothers me as people generally think "oh I'm safe now" when that might not be the case. Considering they wait here with testing to after symptoms it would likely make the tests way more useful then to test everyone. It requires labs and those might also be stressed to a point of breaking if you start testing everyone (if that is even possible) for instance.