From the BBC article linked in post #17:
[begin excerpt]
Dr Arash Alaei runs a clinic in Tehran, where he caters for the growing number of drug addicts and prostitutes who are infected with the virus.
It takes him to parts of Iran which are never seen in the west, where junkies sprawl on streets littered with needles.
Iran has the highest proportion of hard drug users of any country in the world.
Some estimates put the number of users as high as three million - one in 20 of the population.
Junkies are a common site on the streets of the major cities. Prostitution, too, is commonplace.
[end excerpt]
Tehran: Little Los Angeles?