In recent times, prompted by the concern over the spread of HIV/AIDS, commercial sex workers have been the focus of a great deal of attention, primarily with the aim of promoting safe sex as method of preventing disease. Despite the numerous groups active among sex workers, and despite the government's professed interest in the matter, there has been no accurate assessment of the total number of people practising the profession in India. Rough estimates suggest that there are well over ten million sex workers in the country, with the states of Karnataka, Andhra Pradesh, Maharashtra, and Tamil Nadu being considered "high supply zones".
If matters related to the safety of sex work and the rights of sex workers are to be addressed, it is important first to know the extent of the industry, its demography as well as the conditions of work. One of the most systematic and coherent studies was recently carried out in Madras, a city of about six million people and the capital of Tamil Nadu, the state with the highest incidence of HIV cases in the country.