Strengthening HIV Programs in Sub-Saharan Africa Through Implementation Research: A Mixed-Methods Systematic Review

Resource-limited settings face challenges in applying evidence to end the HIV/AIDS epidemic by 2030. Implementation research (IR) has emerged as a promising approach to translate evidence into practice. This review explores how IR has been utilized in sub-Saharan Africa (SSA) to support efforts to end the HIV/AIDS epidemic.

The review protocol was registered with PROSPERO (CRD42024515975). Articles were searched in PubMed, Embase, Scopus, and Web of Science, with a focus on HIV/AIDS evidence-based intervention studies in SSA.

Out of the 2055 retrieved articles, 41 (2%) qualified for final analysis. The findings identify 11 key implementation strategies, including decentralized service delivery, task shifting, integrated HIV service delivery, capacity strengthening in diagnostics and treatment support, health system strengthening, promotion of pre-exposure prophylaxis, prevention of vertical transmission, youth-friendly services, community engagement, innovative technologies, and operational research. These approaches improved access to HIV testing, treatment, and prevention services, enhanced adherence and retention in care, and supported early diagnosis and continuity of care. However, implementation was influenced by cross-cutting barriers such as limited resources and infrastructure, workforce constraints, inadequate training, stigma, weak coordination systems, and policy and funding limitations.

IR provides a structured approach to identifying, adapting, and scaling effective HIV interventions within real-world settings. The evidence highlights its role in supporting diverse strategies across health system levels while accounting for contextual barriers and facilitators. These findings highlight the importance of continued investment in IR and targeted capacity building to strengthen the effectiveness and sustainability of HIV/AIDS programs in SSA.