This is actually good info about convalescents and antigenic therapy. It digs into the thought process and details, but also covers the obvious limitations to the possibility.

A wonderful investigative look at convalescents (people who survived COVID-19 and built up immunity). It discusses how convalescents might return to the workforce sooner than the rest of the population, how there's no guarantee they won't contract COVID-19 again, and how their blood plasma might be used to save lives. Fantastic read and I'm much more knowledgeable after having read it.