evidence: And this is probably going to be a series of steps. We're going to have to do this again and again - dancing in, dancing out - until we get to the point where we either have a vaccine or a prophylactic pill or some regimen, you know, some curative regimen that's so good that we're confident that, you know, if I get sick, maybe I get sick. But if I crash, I can count on being saved. I mean, if we get to that point, maybe we can say, OK. We can all take chances now on getting sick and making ourselves immune by self-infecting - the equivalent of chickenpox parties. Maybe we could do that if we were sure we could save people. But we're not there yet.