GeoVacina Rio Monitor: epidemiological intelligence to restore vaccination coverage in the city of Rio de Janeiro, Brazil.

Vaccination coverage has declined in the municipality of Rio de Janeiro (MRJ) since 2019. To address this issue, within the expansion of the Family Health Strategy (FHS) and epidemiological intelligence, the GeoVacina Rio Monitor was created. Its aim is to recover vaccination for children with delayed doses and monitor pentavalent vaccine indicators in the population registered under the FHS in MRJ from January 2023 to January 2024. Data were extracted from the Electronic Health Record and summarized by FHS team, public health unit (PHU), and planning area (PA). An interactive map enables the viewing of children's information and vaccination status at the team's centroid. Additional features include vaccination coverage monitoring and downloading lists of children to be vaccinated across 237 PHUs. During the evaluated period, the proportion of fully vaccinated children increased from 76.1% (May 2023) to 90.8% (January 2024), a rise of 14.7 percentage points, with a 49.5 p.p. reduction in units with coverage below 80%. The GeoVacina Rio Monitor enhances data quality and restores vaccination coverage, aligning epidemiological intelligence with regional immunization strategies, with the potential for implementation in other municipalities.