First is relationship discrimination, which is what we're talking about today.
Second is job discrimination. The fear of HIV and AIDS can run so deep that a doctor or nurse who poses no scientific risk of transmission can still be prevented from practising their profession, even if they are fully qualified.
Third is insurance discrimination. Right now, for instance, I can't get house insurance so that I can purchase a home, a common event in most people's lives. I can't get life insurance either.
Structurally speaking, those are the main types of discrimination I would point to, aside from the fear conjured up by the AIDS hysteria of the 1980s, of course. The public was shown images of people who were dying and who had no prognosis to live, and the stigma from that is still prevalent in society.