Lesley,
No offense, but I think your sources of COVID and vaccine info is a little lacking.
COVID is most likely going to be just like the flu virus needing boosters. Immunity wanes with time for the COVID vaccines. It doesn't mean the vaccines don't work. It's expected and normal for the anti-bodies to wane over time.
Keep in mind, regardless of the waning, so far it certainly appears that if you are vaccinated the chances of serious hospitalization illness and death are close to zero. The only people dying at this point in the US are the unvaccinated.
