Marcelo Comerlato Scotta1, Rolando Paternina-de la Ossa2, Magali Santos Lumertz3, Marcus Herbert Jones4, Rita Mattiello5, Leonardo Araújo Pinto6. 1. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: marcelo.scotta@pucrs.br. 2. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: rolapater@gmail.com. 3. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: magali.lumertz@pucrs.br. 4. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: mhjones@pucrs.br. 5. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: rita.mattiello@pucrs.br. 6. Centro Infant, Department of Pediatrics, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Avenida Ipiranga 6690, 2nd floor, ZIP-Code: 90610-000, Porto Alegre, Rio Grande do Sul State, Brazil. Electronic address: leonardo.pinto@pucrs.br.
Abstract
INTRODUCTION: The Brazilian childhood National Immunization Program (NIP) introduced live and attenuated varicella vaccination in a single dose, combined as tetraviral vaccine, at 15 months of age in the whole country, during September to December of 2013. The aim of this study was to report trends in incidence of childhood hospital admissions related to varicella and zoster in Brazil from 2003 to 2016, including the first three years after vaccine introduction. METHODS: The number and incidence of hospital admission in patients aged less than 20 years in Brazilian public health system with an admission diagnosis of varicella and zoster from 2003 to 2016 were analyzed and pre (2003-2013) and post-vaccination periods (2014-2016) were compared. The data were obtained from DATASUS, a Brazilian government's open-access public health database system, and analyzed adjusting for secular trend and seasonality if a statistically significant change was found. RESULTS: During the study period, 69,791 admissions due to varicella and herpes zoster occurred in the children younger than 20 years. After adjusting for seasonality, the incidence of hospitalizations decreased from 27.33 to 14.33 per 100000 per year, which corresponds to a reduction of 47.6% (95% confidence interval 18.19-77.04%, p < 0.001) in the vaccinated age group (1-4 years) in 2014-2016 compared to pre-vaccination period. The changes were not significant in the unvaccinated age groups. CONCLUSION: The hospitalizations due to varicella and herpes zoster were decreased by half early after the introduction of a single dose of tetraviral vaccine in NIP in the vaccinated children. Further studies may assess duration and intensity of this effect, as well as the indirect effect in the unvaccinated age groups.
INTRODUCTION: The Brazilian childhood National Immunization Program (NIP) introduced live and attenuated varicella vaccination in a single dose, combined as tetraviral vaccine, at 15 months of age in the whole country, during September to December of 2013. The aim of this study was to report trends in incidence of childhood hospital admissions related to varicella and zoster in Brazil from 2003 to 2016, including the first three years after vaccine introduction. METHODS: The number and incidence of hospital admission in patients aged less than 20 years in Brazilian public health system with an admission diagnosis of varicella and zoster from 2003 to 2016 were analyzed and pre (2003-2013) and post-vaccination periods (2014-2016) were compared. The data were obtained from DATASUS, a Brazilian government's open-access public health database system, and analyzed adjusting for secular trend and seasonality if a statistically significant change was found. RESULTS: During the study period, 69,791 admissions due to varicella and herpes zoster occurred in the children younger than 20 years. After adjusting for seasonality, the incidence of hospitalizations decreased from 27.33 to 14.33 per 100000 per year, which corresponds to a reduction of 47.6% (95% confidence interval 18.19-77.04%, p < 0.001) in the vaccinated age group (1-4 years) in 2014-2016 compared to pre-vaccination period. The changes were not significant in the unvaccinated age groups. CONCLUSION: The hospitalizations due to varicella and herpes zoster were decreased by half early after the introduction of a single dose of tetraviral vaccine in NIP in the vaccinated children. Further studies may assess duration and intensity of this effect, as well as the indirect effect in the unvaccinated age groups.
Authors: Frederico Friedrich; Maria Clara Valadão; Marcos Brum; Talitha Comaru; Paulo Márcio Pitrez; Marcus Herbert Jones; Leonardo A Pinto; Marcelo C Scotta Journal: PLoS One Date: 2020-01-28 Impact factor: 3.240
Authors: Norberto Giglio; Pieralessandro Lasalvia; Manjiri Pawaskar; Cintia I Parellada; Yaneth Gil Rojas; Paula Micone; Virginia V Babic; Silvina E Neyro Journal: Vaccines (Basel) Date: 2022-07-20
Authors: Marcella Z Ribeiro; Emil Kupek; Paulo V Z Ribeiro; Carlos Eduardo Andrade Pinheiro Journal: J Pediatr (Rio J) Date: 2019-12-18 Impact factor: 2.990