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Discrepancy between official records of the Brazilian National Immunization Program Information System and the

Luciana Martins Rozman1, Ana Marli Christovam Sartori2, Alexandra Azevedo Souza3

  • 1Universidade São Judas Tadeu, Cubatão, SP, Brasil.

Epidemiologia E Servicos De Saude : Revista Do Sistema Unico De Saude Do Brasil
|August 6, 2025
PubMed

Insights

Vaccination data in Brazil's National Immunization Program Information System show lower coverage and accuracy than vaccination booklets for children under two. This highlights challenges in maintaining complete and accurate immunization records.

Area of Science:

  • Public Health
  • Epidemiology
  • Immunization Practices

Background:

  • Accurate vaccination records are crucial for monitoring public health and disease prevention.
  • The Brazilian National Immunization Program Information System (SINAN) is a key tool for tracking vaccination coverage.
  • Discrepancies between recorded data and actual vaccination status can impact public health initiatives.

Purpose of the Study:

  • To evaluate the agreement between vaccination data in the Brazilian National Immunization Program Information System (SINAN) and children's vaccination booklets.
  • To assess data accuracy and completeness for children under two years of age in Cubatão, São Paulo.

Main Methods:

  • A descriptive study compared vaccination records from booklets and SINAN for children born in 2019-2020.
  • Concordance analysis included vaccine doses and application dates using Kappa test and intraclass correlation coefficient.

Main Results:

  • Household surveys indicated high vaccination coverage (90-95%) for children under two.
  • SINAN data showed coverage below 70%, with inconsistent application dates in 10% of cases.
  • 24% of children with documented vaccinations in booklets were missing from the SINAN system.

Conclusions:

  • Significant discrepancies exist between vaccination booklets and SINAN data regarding accuracy and completeness.
  • Challenges in data management within SINAN may compromise effective monitoring of vaccination coverage in Cubatão.
  • Improving data quality in immunization information systems is essential for public health surveillance.
Abstract

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