Earlier quoted context omitted.
This comment avoids the facts noted in the linked article, which seem to point to perpetual immunity of anyone who was infected by SARS-CoV-2 in the past.
There are multiple documented cases where a person caught COVID twice (where the two instances were genetically different, and therefore not a false positive caused by lingering dead virus). The linked article only indicates that antibody production should continue for a long time, but that's only one factor in robust long-term immunity. The rate of antibody production and the set of proteins that the antibodies targ…
There have been far more breakthrough cases of fully vaccinated people than there have been confirmed reinfections.