To examine how cultural health brokers, as trusted intermediaries between formal systems and diverse ethnocultural communities, help navigate decisional conflict and misinformation regarding COVID-19 vaccination and to identify how their work contributes to system resilience in crisis contexts.

A community-based participatory action sensemaking research project to capture the real-time work of cultural health brokers in helping people navigate decisional conflict for vaccination.

Multicultural Health Broker Cooperative in Edmonton, Alberta where brokers speak 54 languages and serve more than 10 000 people from diverse ethnolinguistic communities. 28 cultural health brokers (9 male; experience 4–25 years) contributed to data collection and analysis between 16 September 2021 and 16 December 2021.

The brokers captured real-time reflections and self-interpretations in the SenseMaker platform through a theoretically informed, codesigned, mixed-method data collection tool. The team engaged in 13 weekly, 90 minute, audio-recorded and transcribed sessions: seven focused on understanding and action planning and five reflecting on the SenseMaker data, the focus of the thematic analysis. Data were managed in NVivo (QSR International, Version 12, 2018).

Brokers collected 277 narratives and conducted 13 sensemaking sessions. Understanding and purpose were identified in 68% of narratives as key to achieving coherence; 81% of narratives highlighted trust as crucial to what was needed for action; 62% of narratives reflected on a potential risk, with loss of trust a concern in 70% of them. A rich understanding of the sources of decisional conflict and misinformation was achieved and managed through outreach. There were four entwined components to navigation of the evolving complexity of COVID-19 vaccination: (1) building and sustaining trust; (2) strengthening relationships; (3) creating safe spaces for collective sensemaking and solution finding; and (4) leveraging cultural and social capital to address barriers. Through these mechanisms, brokers reduced decisional conflict and misinformation, supporting informed, values-congruent decisions.

Cultural health brokers, embedded within communities and linked to formal systems, play a critical role in crisis response by fostering trust, mobilising resources and enabling collective sensemaking. This study demonstrates how these intermediaries’ contextually and culturally attuned work provides a model for building system resilience for future crisis response.

To assess the preliminary effectiveness and cost-effectiveness of a culturally tailored, music-based broadcast intervention delivered through schools and community radio to improve referral adherence among schoolchildren to inform the need for a definitive trial.

Pilot randomised interventional study.

18 schools across Unguja and Pemba islands, Zanzibar.

Schoolchildren (6–18 years old) who failed vision screening and were referred for care recruited from January to February 2024. The registered sample size reflects the full cohort, including children and adults. This manuscript reports on the child cohort only, as per the predefined analysis plan.

Group 1 received 3 months of school-based broadcasts of culturally tailored 3–6 min songs (played three times daily on 2 days per week), followed by 3 months of community radio broadcasts of additional songs (3–6 min, aired three times daily); Group 2 received the community broadcasts during the same period as Group 1.

The primary outcome was change in referral adherence assessed at two time points: 3 months after school broadcast and 3 months after community broadcast, expressed in difference-in-difference estimates and effect sizes. Secondary outcomes included reporting of adverse events and contamination, and cost-effectiveness calculated as cost per child reached and cost per referred child accessed care in study groups and combined intervention.

374 children were referred to eye care services, including 246 in Group 1 and 128 in Group 2. Referral adherence was 69.8% in Group 1 and 42.9% in Group 2 (p=0.0006). The school broadcast phase yielded an effect size of 0.26 and a cost of US$4.65 per referred child accessing services. The community broadcast produced an effect size of 0.21, with a cost of US$0.29 per person reached. The combined intervention reached individuals at a cost of US$0.37 per person. No adverse event and contamination was reported.

A combined school and community broadcast intervention improved referral adherence in this pilot trial, with evidence of cost-effectiveness. These findings support the conduct of a fully powered definitive trial.

NCT06469697.