Assuming immunity is both short-lived and predictably so for everyone. If the amount of immunity varies significantly by individual, then it’ll just be an ongo

Assuming immunity is both short-lived and predictably so for everyone. If the amount of immunity varies significantly by individual, then it’ll just be an ongoing slow burn and not another spike of infections. And that also assumes that at a slow burn it would be able to maintain R0 > 1.0.