It has been explained in MSM too, just as frequently.

1: If you are vaxxed and still transmit the disease to
someone, do they get less severe symptoms, too?

2: What, exactly, is the interpersonal aspect at all?

Boggles the mind, that Covidians cannot spot the fact
that the deal looks more meager by the day.

It has absolutely nothing to do with "public health".
Impossible to come to any other conclusion.