Association of Prior COVID-19 Vaccination With SARS-CoV-2 Infection and Death in Children and Young Persons During the Omicron Variant Period in Brazil.
JAMA pediatrics（2023）
Abstract
This case-control study evaluates nationwide information surveillance systems in Brazil to estimate vaccine effectiveness against outcomes of COVID-19 in children and young persons.
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Key words
omicron variant period,infection,sars-cov
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