As noted in sibling, the booster shots are to "remind" your immune system that an infectious bug is out there. If COVID begins to mutate in ways that make the

As noted in sibling, the booster shots are to "remind" your immune system that an infectious bug is out there. If COVID begins to mutate in ways that make the vaccine (and anti-bodies it causes) less effective, we would be in a situation like the flu - annual vaccines based on that year's strain (which takes some guesswork). The disease is then called endemic. But, there is currently no indication COVID will become endemic. It might. It might not. We don't know, but current knowledge tends to indicate it won't.