While we obviously don’t know his specific medical details (and really, it’s none of our business), HIV treatment is effective at reducing transmission. This is known as the “treatment as prevention” strategy.
There have been many advances in HIV care since Rock Hudson was diagnosed in the 1980s. At this time, the prognosis of AIDS was similar to patients with advanced cancer.
Since the mid-1990s, combinations of antivirals have markedly improved the survival of people living with HIV. Modern combinations are simple to take (as few as one tablet, once a day) and associated with much fewer side effects than older drugs.