[mlyle]

Yes. I know immunology is way more complicated than I understand, and that I'm oversimplifying even from my level of understanding. There's all kinds of immune responses we're interested in here.

However, sterilizing antibodies are most interesting because they are the strongest factor in preventing transmission.

People with weak immune responses of various kinds can be expected to have more infections and to be infected for longer times, and they provide selective pressure to evade the remaining mechanisms.