The AID’s epidemic illuminated a great deal about how the human immune system works.
I was in the city of SF when pretty much every gay man we knew (some were teachers in our school, some at my dad’s work, some friends of friends, etc.) died. In the early to mid 1980’s. It even extended into places where I later worked in the 80s, southern CA.
But I don’t know what happened, it’s like 5 more took the place of every one who died!!??