 Despite its high acceptability among enrolled participants and preliminary evidence of efficacy, the two-session RDS-CTTN approach may be less successful in enrolling those in the HRA who would decline confidential HIV testing in a formal setting or have poor access to such testing. The RDS-CTTN intervention may not be optimal for reaching those with the greatest psychosocial barriers to regular HIV testing, who may for a number of reasons have high rates of undiagnosed HIV, or individuals, particularly women, with multiple job and family responsibilities who may not have time for a two-session intervention. Indeed women are under-represented in both RDS-CTTN 40 and VBS 30. It is possible to test participants for HIV in a first encounter, aswe do in VBS and as other studies have done. In the supplement study, we build on lessons learned from themain study in progress and the literature to address this concern. 