Daily oral PrEP will be delivered to men who have sex with men (MSM), female sex workers (FSWs) and young women (YW) as part of a defined package of HIV combination prevention intervention for 12 months in 5 sites in Kenya. The project will assess adherence, adverse events, side effects, user satisfaction, cost, facility preparedness and provider competencies. PrEP eligibility and screening tools for MSM, YW and FSWs will be piloted and validated. Pregnant women will be enrolled in a sub-group and followed through 12 months post- partum to measure mother and infant outcomes that include health status, birth outcomes, birth defects, risk behavior and PrEP adverse effects. With lessons from initial PrEP studies in West and Central Africa, this project will apply good participatory practice guidelines through 1) continuous engagement with communities of FSWs, YW and MSM and 2) development and use of a communication engagement and advocacy strategy that will provide correct information, address attitudes and concerns whilst increasing demand for PrEP uptake. The actual cost of delivering HIV combination prevention which includes PrEP will also be assessed and cost effectiveness modeled.