Abstract Issue Pilot interventions are not always put into practice at scale. When they are, effectiveness is often highly reduced in the field due to contextual factors. To effectively implement a scale-up, stakeholders’ involvement is crucial. Curema is an international research evaluating an intervention aiming to reduce malaria transmission by distributing RDTs and treatments in mobile hard-to-reach populations. This intervention might be scaled-up in Brazil, Suriname, and French Guiana as a tool of national malaria programs for specific areas and populations. Description of the problem An interactive pre-planning assessment was conducted involving key stakeholders -implementers, decision-makers, and researchers - in working sessions, semi-structured interviews, and formal meetings. Mendelow’s Power/Interest Matrix was used to map stakeholders and a SWOT analysis was conducted using ExpandNet/WHO Framework to evaluate contextual factors and identify levers and obstacles influencing the scale-up. Results A total of 23 participants were involved. Health authorities had high power and generally high interest, while implementers and recipients had lower power and different interest levels. National engagement for WHO E2025 or E2030 enhanced scalability and represented a main opportunity in the three countries. Nevertheless, several regulatory and administrative aspects were identified as potential obstacles to be addressed to make scale-up realistic. Funding was also a major concern for sustainability. The need for regional cooperation was emphasized to achieve malaria elimination. Lessons Despite financial and regulatory challenges, a window of opportunity is open to scale-up Curema. Identifying and involving stakeholders in a pre-planning assessment and advocating for foster regional cooperation are crucial steps to support the scale-up. Stakeholder analysis should be refined during the scaling-up to capture further changes in factors that might influence the process. Key messages • Engagements with WHO represent windows of opportunity to enhance Curema scale-up. • Stakeholder involvement and regional cooperation are crucial for scaling up Curema in Brazil, French Guiana and Suriname.
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