> vaccinated don’t get as sick to end up in the hospital and die
the risk is proportional to exposure. 95% efficiency quoted from Phase 3 were under condition of “sort of” blind test – ostensibly, the subject did not know what they got [we know now that many of those who got a real vaccine felt it, but still …]. so 95% [20x] is under assumption that people behave same way. If you used to keep SD and now dance at the weddings, then your reduction is less. And may decrease with time. On the other hand, T-cells, etc seem to offer long-term protection against worst outcomes.
on a stupid side, CDC, and doctors who “follow their science”, recommends against doing antibody tests to see if antibody levels are holding because “it is not yet approved”, despite papers showing serious correlation between antibody levels and protection on average. CDC explains, in their usual amateur social engineering style, that they do not want people to see high antibody results and then behave irresponsibly. Of course, as now 50+% are already irresponsible, there is value to identify people who have low levels and are at highest risk and, thus, should be more cautious.