> So even if 100% vaccination does not stop surges in covid hospitalisations, vaccines won't be considered ineffective, right? Umm, of course? If we had a vac

> So even if 100% vaccination does not stop surges in covid hospitalisations, vaccines won't be considered ineffective, right? Umm, of course? If we had a vaccine for e.g. the flu, that cut hospitalizations in half, we would call that effective. Or maybe not - effective here is a very vague word. We'd more correctly say "this vaccine reduces hospitalizations by 50%". If it were a particularly bad flu season and literally everyone got the flu (as well as everyone getting vaccinated), hospitals would be overwhelmed, because cutting in half isn't enough. But that wouldn't change the base fact - this hypothetical vaccine cut hospitalizations in half.