> Herd immunity would require that over half of the population get the disease.
Doesn't this also assume that those people remain inoculated to further viral infections after being infected the first time? From my limited understanding, that is not a given for SARS-CoV-2.
Correct. This is an optimistic scenario for herd immunity. It assumes low mortality (probably true), no permanent damage to those who survive (unclear, but probably untrue), and immunity lasting a couple years (long enough to remain immune until a vaccine is available).
Doesn't this also assume that those people remain inoculated to further viral infections after being infected the first time? From my limited understanding, that is not a given for SARS-CoV-2.