2. Materials and Methods 
dengue
DENGUE
The COESA study was a pragmatic cluster randomized controlled trial, implemented in 2019 and conducted by a partnership of Canadian and Fortaleza researchers, aimed at reducing dengue incidence in children aged 3–9 years old using a participatory mobilization approach in Fortaleza, in the northeastern Brazilian state of Ceará [As there exists no treatment for dengue and vaccines are not yet widely available, preventing or reducing dengue transmission largely depends on controlling Aedes mosquitoes and limiting human-mosquito contact [Following Camino Verde’s success, the COESA study was launched in Fortaleza in 2019. The COESA research team was formed of Canadian and Brazilian researchers. Principal and co-investigators were trained in a diversity of disciplines (i.e., public health, epidemiology, medical anthropology, entomology, participatory research) with experience working on arboviruses, including dengue. Brazilian researchers had extensive field experience in Fortaleza with existing ties to community leaders, community health workers, and entomological agents in the neighborhoods targeted for the study. Their combined experienced, along with that of the principal investigator of the Camino Verde trial, directly informed the planning of the COESA study, a two-year process prior to data collection. The research team consulted various local stakeholders during the planning phase of the study, including researchers from other local institutions, teams within the municipality of Fortaleza, and the unions for entomological and community health workers.When the selection of clusters began, the objective was to have 34 clusters in each arm with 86 children per cluster, for a total of 5849 children [