the way you describe it sounds like the natural way is more resistant to mutations. And the low efficacy of the current vaccines against delta dovetails well t

the way you describe it sounds like the natural way is more resistant to mutations. And the low efficacy of the current vaccines against delta dovetails well to it. >they'll tend to be specifically tailored to recognizing the surface spike the situation is worse than that. Most of the current covid vaccines are targeting only a segment of the spike protein, and all those segments are largely overlap, ie. union of those segments of different vaccines isn't much bigger than their intersection, so just a couple of mutations (https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0250780 https://journals.plos.org/plosone/article?id=10.1371/journal...) is enough for the virus to escape almost all of those vaccines.