So far there’s nothing to indicate that SARSCOV2 is going to go away.
Yup
Unfortunately. Its propensity to mutate to avoid immunity suggests the opposite.
True that is a factor but actually not the main reason. There are two more important reasons:
1) The human immune system attenuates to the same strain over time. So even if there is no mutation you can get the same strain multiple times over relatively short periods (year or two)
2)A large portion of people who catch covid are contagious but completely aymptomatic. I myself have had it 7 times (verified) and only could tell I had it at all once
Yersinia Pestis never went away. It was the conditions that helped it propagate that improved. Even then the multiple waves of the plague went well beyond a few years.
Not to mention damn near wiped out the bulk of civilization several times over in the process.