The goal of this trial is to reduce the general error related to vaccines and immunizations (composited on secondary endpoint), after 11 moths of folow-up after cluster randomization and stepped wedge on primary care on brazilian public health. The main questions it aims to answer are: 1. To evaluate the effectiveness of a multifaceted intervention in vaccination rooms in reducing vaccination errors. 2. To describe the rate of adverse events following immunization (AEFI) and the associated factors.
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Reduction of overall errors attributable to vaccination and immunization processes.
Timeframe: From Randomization to the end of Follow-up (12 months)