Background:
One of the main disease prevention measures is immunization. In recent years, Brazil has recorded significant declines in the populations vaccination coverage. The was to estimate the prevalence of immunization coverage and analyze the factors associated with complete immunization coverage.

Methods:
cross-sectional, population-based survey study with cluster sampling carried out in the city of Vitória, Espírito Santo, Brazil, between December 16, 2020 and January 4, 2021. The study population was the cohort of live births from 2017 and 2018. An interview and analysis of the childs vaccination card was carried out. The prevalence (P) of the complete vaccination schedule and for each vaccine was estimated. To verify the association of independent variables with vaccination coverage, logistic regression was used. Results were expressed as odds ratio (OR) and 95% confidence interval (95%CI).

Results:
792 vaccination cards were evaluated. Complete vaccination coverage was 51.47% (95%CI 46.05-56.85). The pentavalent and pneumococcal vaccines (P 88.80%CI95% 46.05-56.85) showed the highest prevalence of children immunized with the first dose. The lowest prevalence was the first poliomyelitis booster (P 63.20%CI95% 55.70-70.10) of immunized individuals. Using the private service to carry out the immunization (OR 0.32 CI95% CI 0.15-0.68), and being the fourth child (OR 0.13 CI95% CI 0.02-0.71) had the lowest chance of have complete immunization coverage.

Conclusion:
We identified low vaccination coverage. Using a private health service and the childs birth order was associated with a lower chance of having full vaccination coverage. The need for innovative strategies to increase childhood immunization coverage.