Acute Partner and Social Contact Referral: iKnow

This two-arm randomized study will evaluate an "unaware intervention package" among HIV-infected persons attending Sexually Transmitted Infection (STI) clinics in Lilongwe, Malawi. The package includes detection of Acute HIV Infection (AHI), contract partner notification, and social contact referral to find persons unaware of their HIV infection. The package will be compared to the current standard of care, passive partner notification, as the base case. Participants will be randomized to receive the intervention package - classified as the "active arm" of the study. The study will characterize the HIV stage (acute, recent, chronic) of the index participants and their sexual partners and social contacts, and use the HIV staging combined with sexual behavior data, phylogenetic analyses, and egocentric sexual/social network assessments to assess the potential impact of the intervention on ongoing transmission. We will obtain the distributions of numerous transmission-related attributes among the recruited contacts/partners of STI clinic patients, including contacts' and partners' HIV infection status and stage, HIV diagnosis/care/treatment status, STI status, and sexual behaviors. This information will allow us to model testing, linkage, and treatment interventions targeted to the traced partners and/or social contacts of acute, recent, and/or chronic index cases identified in STI clinics. We can then assess and compare the predicted effects on population-level HIV incidence of interventions attached to each recruitment method (tracing partners, social contacts, or both) and index case and contact disease stage (acute, recent, and/or chronic).