a significant difference between tb and aids being that tb is airborne, while aids requires an exchange of bodily fluids to spread, it seems a little cruel to quarantine aids patients. particularly since an aids patient not on medication can live as long as 13 years after contracting hiv. 13 years is an awfully long time to spend dying of a horrible disease alone in an asylum, when an aids patient's (responsible and informed) presence in society doesn't harm anyone. it's natural to be scared of an epidemic, but utilitarian decisions made to stop the spread ought to be those that will actually do some good for the rest of the populace.