The Corridors of Hope III/FHI360 with funding from USAID/PEPFAR implemented (September 2009-October 2015) a comprehensive HIV prevention strategy in 10 border and transit selected districts in Zambia to reduce sexual transmission of HIV among most at risk populations including FSWs and their clients residing in or passing through border towns. The strategies included HIV testing and counselling, behaviour change through outreach and peer education, improved management of STIs, social marketing of condoms and family planning. The 2015 integrated Bio-Behavioural Surveillance Survey (IBBSS) among FSWs and Behavioural Surveillance Survey (BSS) among LDTDs were carried out to measure the outcomes of these prevention interventions efforts among FSWs and LDTDs