1. Mitchell KM 1 *, Foss AM 1, Prudden HJ 1, Pickles M 1,2, Williams JR 2, Johnson HC 1, Ramesh BM 3,4, Washington R 3,5, Isac S 3, Rajaram S 6, Phillips AE 2, Bradley J 6,7, Alary M 6,7, Moses S 4, Lowndes CM 7,8, Watts CH 1, Boily M-C 2, Vickerman PT 1,9 1 London School of Hygiene and Tropical Medicine, London, UK, 2 Imperial College London, London, UK, 3 Karnataka Health Promotion Trust, Bangalore, India, 4 University of Manitoba, Winnipeg, Canada, 5 St. John’s Research Institute, Bangalore, India, 6 CHARME-India Project, Bangalore, India, 7 Centre Hospitalier Affilié Universitaire de Québec, Québec, Canada, 8 Health Protection Agency, London, UK, 9 University of Bristol, Bristol, UK Abstract #THPDC0101 Sexual mixing patterns between men who have sex with men in southern India: Implications for modelling the HIV epidemic Kate Mitchell Kate.Mitchell@lshtm.ac.uk

2. Levels of like-with-like mixingMedian fitted HIV prevalence Different mixing patterns give similar projected HIV prevalence trends KH = mostly receptive DD = versatile PB = mostly insertive

3. Targeting receptive MSMTargeting versatile MSM Overall impact of PrEP unaffected by mixing unless versatile MSM targeted KH = mostly receptive DD = versatile PB = mostly insertive Assuming PrEP 92% effective with 90% coverage Easier to reach for intervention