Health officials are not sure, but they seem hopeful that if you survive a covid19 attack you get some sort of immunity to another attack, and you don't carry the disease to give to somebody else. If that turns out to be true, how does our society work in, say, three months. We'll have half the population being survivors, and half as yet uninfected. The survivors can go back to work. Do the uninfected still stay home to avoid getting infected? Or do they deliberately expose themselves to a dangerous disease, so they can go back to earning a salary -- if they survive that is? Boy is that bizarre. And what happens to social distancing? Do the uninfected wear special clothing to tell everybody they're still social distancing, so stay away from them?