This summary assesses the current state of evidence on each approach in tabular form, providing: the definition and objectives; evidence of effectiveness; operational considerations (e.g., training, staffing, and logistics); cost considerations and evidence on cost-effectiveness; operational successes and challenges; and areas for future research and learning. This document is not intended to endorse any particular approach. Rather, it aims to objectively present the state of the existing evidence on each approach, so as to inform decision-making among practitioners looking to further test, refine and implement such approaches.