sentences:  The ownership and management of the Sonagachi Project was taken over by DMSC from the All India Institute of Hygiene and Public Health, a central government public health training and research institute based in Kolkata, which had initiated the programme in 1992.After gaining control of the STD/HIV Intervention Programme in 1999, DMSC began replicating the Sonagachi model in other red light areas in West Bengal.DMSC also implements STD/HIV intervention Programme among street-based sex workers and their clients, covering a population of over 20,000 sex workers and migrant labourers.