Johannesburg - Esselen Street Clinic, in Johannesburg's edgy, bustling inner-city suburb of Hillbrow, houses the only health centre in Johannesburg offering medical care aimed at sex workers.

Not much good news tends to emanate from Khayelitsha. More often than not the sprawling Cape Town township is associated with high levels of violent crime, poverty, disease, unemployment and a lack of basic services and housing. But the township has made huge inroads in tackling TB, a curable disease that mostly infects people living with HIV and poor people.