National Vaccine Coverage Survey 2020: methods and operational aspects

Objective To estimate measles-mumps-rubella vaccination coverage, delay and loss to follow-up in children up to 24 months old living in Brazilian cities. Methods Surveys and questionnaires with a retrospective cohort of live births in 2017-2018, analyzing vaccination coverage and sociodemographic data of children and families, based on vaccination card records and interviews. Results Valid coverage of first dose was 90.0% (95%CI 88.9;91.0) and 81.1% for the second dose (95%CI 79.8;82.4). Delay for both doses was 23.2% (95%CI 21.9;24.5) and loss to follow-up was 10.8% (95%CI 9.9;11.8). Socioeconomic stratum A had the lowest vaccination coverage and the higher the child’s birth order, the lower the vaccination coverage for the second dose. Children whose mothers had 13 to 15 years of education had higher vaccination coverage. Conclusion Coverage did not meet the recommended target. Differentiated strategies to resolve difficulties in access, misinformation, and vaccination hesitancy will help improve vaccination coverage.

Vaccination coverage, delay and loss to follow-up of the triple viral vaccine, in live births between 2017 and 2018 in Brazilian cities

D’Agostini,

Zambom,

Moraes

et al. 2024

Cobertura vacinal, atraso e perda de seguimento da vacina tríplice viral, em nascidos entre 2017 e 2018, em cidades brasileiras

D’Agostini,

Zambom,

Moraes

et al. 2024

RESUMO Objetivo Estimar cobertura vacinal, atraso e perda de seguimento da vacina tríplice viral, em crianças até 24 meses residentes em cidades brasileiras. Método Inquérito domiciliar baseado em uma coorte retrospectiva de nascidos vivos em 2017-2018, que analisou cobertura e dados sociodemográficos das crianças e famílias, a partir dos registros da caderneta de vacinação e entrevista. Resultados A cobertura válida da primeira dose foi de 90,0% (IC95% 88,9;91,0), e da segunda, e 81,1% (IC95% 79,8;82,4). O atraso para ambas as doses foi de 23,2% (IC95% 21,9;24,5) e a perda de seguimento de 10,8% (IC95% 9,9;11,8). O estrato socioeconômico A apresentou menor cobertura e, à medida que a ordem de nascimento aumentava, menor era a cobertura para as duas doses. Crianças de mães com 13 a 15 anos de escolaridade apresentaram maior cobertura. Conclusão As coberturas não alcançaram a meta preconizada. Estratégias diferenciadas para dirimir dificuldade de acesso, desinformação e hesitação poderão melhorar a cobertura.

Analysis of polio vaccination status in a cohort of live births in 2017 and 2018 in Brazilian cities: a national vaccination coverage survey

Franco,

França,

Moraes

et al. 2024

Objective To describe the polio vaccination status in 26 state capitals, the Federal District, and 12 municipalities in Brazil, among children born between 2017 and 2018. Methods This was a population-based household survey conducted from 2020 to 2022, which assessed polio vaccination coverage in children, considering valid, administered, and timely doses by municipality. Results Data were collected from 37,801 children. Vaccination coverage for the complete valid dose schedule was 87.5% (95%CI 86.2;88.7), dropping to 79.6% (95%CI 78.1;81.0), when the booster dose was considered. The dropout rate was 4.5% for the complete schedule, and 11.7% for the first booster. There was no correlation between campaign implementation and high coverage. Conclusion Vaccination coverage for the complete valid dose schedule and the first booster did not meet the 95.0% target. Regional disparities and the association between vaccination coverage and social indicators should be taken into consideration in strategies to increase coverage.