Starting HAART drugs (for hiv+) can do this to a person. Once their viral load drops, and they adjust to the drugs they return to “normal” as long as they stay on the drugs.
Anymore, they detect hiv so early, and the drugs are so affective in suppressing the virus, it’s not common to see the AIDs sufferers of years past.
Apparently he has his Manhattan apartment for sale, if that means anything.