[maxerickson]

The antibodies produced by any vaccination series wane, it isn't a surprise that it happened with the COVID vaccines. The mRNA vaccines do induce memory T cells, which is exactly persistent immunity, so the immunity doesn't 'just' wane.

Repeated doses of the vaccine broaden and increase the antibody response, so of course it makes sense to encourage them when infections are raging, and an annual booster will induce an antibody response, providing increased protection for a period of time, so of course it makes sense to encourage them, especially for more vulnerable people.

This inability to look at things in a sort of probabilistic sense, where things can be good without being perfect, is incredibly damaging.