 The investigators will conduct a two-arm Phase II community randomized controlled trial of a community-based combination HIV prevention intervention among FSWs in Iringa, Tanzania. The model was developed on the basis of prior formative research and mapping and utilizes an ongoing research infrastructure. The combination package will include integrated biomedical, behavioral and structural components: 1 mobile HIV testing and risk reduction counseling; 2 service navigation to facilitate access to treatment and retention in care; 3 sensitivity training for HIV clinical care providers; 4 SMS text messages to promote adherence to care and ART; 5 venue-based peer education and condom distribution; and 6 a community drop-in-center to promote cohesion and collective action to reduce stigma and discrimination. The investigators seek to establish base rates of key outcomes including HIV incidence and viral load suppression, examine the socio-structural and behavioral pathways of the intervention, assess feasibility, acceptability and safety, and document preliminary effectiveness. Should compelling indications of safety, feasibility, acceptability and initial effectiveness be found, study results will inform the first Phase III RCT of community-based combination HIV prevention among FSWs. 