In the early 1980s, when the first cases of AIDS were being reported in the gay population and among intravenous drug users, epidemiological research indicated that the disease was both blood-borne and sexually transmitted. Mental health care workers had little concern about infection among people with serious and persistent mental illness, because this population was felt to be too disabled to engage in the sexual or needle-sharing behaviours that put one at risk. Yet the first case of AIDS in a US state psychiatric facility was diagnosed in 1983, when a woman in her mid-20s, who had been hospitalised for several months, developed Pneumocystis carinii pneumonia (Cournos et al, 1989). This case was quite shocking to the treatment team, for two reasons: first, AIDS had unexpectedly entered the psychiatric population; and second, the person infected was a woman, when the disease was being reported almost exclusively in men in the United States.