[Rapid vaccination monitoring and its impact on vaccination coverage for high-quality catch-up campaigns in the Dominican Republic, 2023Monitoramento das estratégias de vacinação e impacto nas coberturas de vacinação para campanhas de seguimento de alta qualidade na República Dominicana, 2023].

Objective: To assess the contribution of rapid vaccination monitoring to the achievement of vaccination coverage targets in catch-up vaccination campaigns.

Methods: Data on catch-up vaccination were obtained from the database of the Directorate of Vaccine-Preventable Diseases. Data analysis was performed in Stata V.15. Frequency and summary statistics were calculated; the value was used to determine statistical significance. The change in mean coverage between interventions was assessed with Student's -test.

Results: During the catch-up campaign, 815,482 children in 157 municipalities were immunized, and 2,431 rapid monitoring activities were carried out. Prior to rapid monitoring, measles and rubella (MR) vaccine coverage was 85.7%, while bivalent oral polio vaccine (bOPV) coverage was 89.9%; coverage was homogeneous in 78% of municipalities. After rapid monitoring, MR coverage rose to 98.7% and bOPV coverage to 100%. MR coverage increased by 14.6% and bOPV coverage by 11.7%; both changes were statistically significant (Student's -test: 12.3 and 10.8, respectively; = 0).

Conclusion: Rapid monitoring is a useful strategy for validating coverage during catch-up vaccination campaigns and should be carried out by outside teams. The reported data can be used to improve the accuracy of coverage data. Rapid monitoring is an appropriate strategy from a cost-benefit standpoint, and we recommend its use to assess data quality during catch-up vaccination campaigns.