I think we will discover that the family of coronavirus mutate to a moderate degree year to year normally, and that normally, if we were exposed at a young age, we also adapt and accumulate resistance to this family of viruses. The only reason we didn’t put much effort into learning about them is because all they did for the most part was to cause a mild illness that we call “the cold”. And in fact, that’s exactly what most young people get with COVID, a cold like illness. The problem, as mentioned above, is that older people haven’t had a chance to “catch up” with this novel type of virus, so can get really ill and could die. At some future time, the whole pandemic will devolve into an endemic cold like illness that we will lump into the common cold. What to do between now and then is the sticky wicket.