Operationalizing rapid implementation science for responsive HIV programs.

Introduction: HIV and other public health programs operate within dynamic, resource-constrained environments, requiring timely, evidence-informed decisions that align with service delivery. Rapid Implementation Science (RIS) provides a pragmatic approach to generating relevant, actionable evidence aligned with program needs. In this article, we propose a suite of rapid, fit-for-purpose methods and systems-level enablers to facilitate RIS. We synthesized examples of rapid research in HIV and global health that produced actionable findings. Main body: We propose a cascade for operationalising RIS within HIV and other public health programs. First, program-embedded formulation of research questions and regulatory governance, co-led by implementers, researchers, and decision-makers, to align with program priorities and timelines. Second, fit-for-purpose study designs, spanning rapid qualitative methods, mixed-methods frameworks, and pragmatic quantitative approaches, with iterative testing, early assessment of proximal outcomes, and adaptive learning without compromising rigour. Third, pre-prepared data systems, combined with fast, low-burden data collection techniques, enable timely analysis by leveraging routine clinical data, real-time dashboards, and mobile or crowdsourced tools. Finally, these approaches should generate decision-ready results that inform mid-course program adaptation, resource reallocation, and policy-relevant action. Conclusion: RIS should be leveraged to align scientific inquiry with the pace of real-world public health programs through building collaborative platforms, analysis-ready data infrastructure, and adopting innovative rapid study designs that can generate timely, rigorous, and decision-relevant evidence. Future efforts should expand testing of hybrid rapid methods, strengthen locally led capacity, and document trade-offs between speed and rigour.