A review of 13 studies found that HIV testing programs built around existing social relationships increased testing uptake, highlighting the potential of peer networks to extend the reach of prevention services.
What they studied
Researchers reviewed HIV testing programs in low- and middle-income countries that used existing social relationships to reach people with testing information and services.
These approaches often involved recruiting and training individuals to share testing opportunities with people in their personal networks.
The review included 13 studies, eight of which were randomized controlled trials. Researchers assessed testing uptake, new HIV diagnoses and connection to care.
What the research found
Across the studies included in the pooled analysis, social-network approaches increased HIV testing uptake by approximately 12% relative to standard testing approaches after four months.
Programs used different models, including peer referrals, distribution of HIV self-testing kits and direct engagement through existing social connections.
The findings showed that network-based approaches can increase participation in HIV testing across different settings and populations.
The review did not establish a clear additional benefit for new HIV diagnoses or connection to care, although the programs varied considerably in how they delivered services and supported participants.
What this helps us understand
The research provides evidence that existing social relationships can help more people access HIV testing.
Rather than relying exclusively on health facilities or public campaigns, these approaches bring testing opportunities into the networks through which people already interact and exchange information.
The findings are significant because they demonstrate a measurable benefit from involving people in reaching others within their communities.
They also help clarify the contribution of peer engagement within HIV prevention. Social networks can expand the reach of testing, while access to subsequent services remains an important part of the wider care experience.
Together, these findings support the value of community relationships as a way to connect more people with HIV prevention services.
