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> Also with regards to fundamental changes to the immune system - this is also true.

As far as I understand (from the wikipedia article) the Hoskins effect (also) applies if you simply got infected once. It's not something specific to the vaccine.

Claiming the "vaccine causes a fundamental change" is a bit misleading. The vaccine OR infective exposure have the described effect, which is normal! And altering the immune system to prepare it for future infections is the point of any vaccine, isn't it?

Now, one might say that it's not good to vaccinate everyone so that there remains a population that can get freshly infected with new variants and build up immunity fresh. But they'd then be altering their immune system by the response to that as well, if they don't die from the infection.