Temporal and spatial distribution of polio vaccine coverage in Brazil between 1997 and 2021.
Nathanael de Souza MacielHévila Ferreira Gomes Medeiros BragaFrancisca Jessika Nunes de MouraFrancisco Jardsom Moura LuziaIsabelle E Silva SousaEmília Soares Chaves RoubertePublished in: Revista brasileira de epidemiologia = Brazilian journal of epidemiology (2023)
There was significant heterogeneity in coverage among states and a strong decrease trend in vaccination rates, which could facilitate the circulation of the poliovirus and pose a threat to the susceptible population.