The reason COVID=19 hit the way it did was because it was novel; there were not similar diseases from an immunological standpoint being spread widely. Right now

The reason COVID=19 hit the way it did was because it was novel; there were not similar diseases from an immunological standpoint being spread widely. Right now, exposure to one COVID strain (or a vaccination against a COVID strain) seems to confer some benefits against infection and/or serious disease from another COVID strain. In other words, as COVID becomes less novel, we become more prepared for new variants. We may end up having to have annual COVID vaccines the way we do flu vaccines, but even people who are unvaccinated against a particular flu strain have antibodies from previous flu strains that offer some measure of protection. That's going to drive down the reproduction rate and the lethality of future COVID strains. That said, there may not be a clear "end point" in the sense of we go back to how things were before. We may simply be heading towards a new steady state with periodic vaccination efforts and some risk of COVID variants all the time.