I don't know what you're trying to accomplish with this kind of speculation in the context of the thread (namely: infected people might not develop immunity, th

I don't know what you're trying to accomplish with this kind of speculation in the context of the thread (namely: infected people might not develop immunity, therefore herd immunity might not be possible). Is it possible that we won't develop an effective vaccine? Yes, of course. We've never successfully made a coronavirus vaccine. But 1) that doesn't tell you much about the natural state of immunity for a virus (i.e. there are/were lots of viruses that infer immunity for which we had difficulty creating a vaccine), and 2) let's say you're right, and it isn't possible to gain immunity at all...what are we supposed to do then? Lock ourselves inside forever? Obviously, we're eventually going to end this, one way or another. Either we achieve herd immunity, or we just learn to live with another endemic virus that is occasionally fatal to a small percentage of the infected. I feel like there are a lot of "contrarian" types here who just want to make a fetish of the societal doom aspect of this thing.