Author: Braeye, Toon; Cornelissen, Laura; Catteau, Lucy; Haarhuis, Freek; Proesmans, Kristiaan; De Ridder, Karin; Djiena, Achille; Mahieu, Romain; De Leeuw, Frances; Dreuw, Alex; Hammami, Naima; Quoilin, Sophie; Van Oyen, Herman; Wyndham-Thomas, Chloé; Van Cauteren, Dieter
Title: Vaccine effectiveness against infection and onwards transmission of COVID-19: analysis of Belgian contact tracing data, January-June 2021 Cord-id: 3104fstf Document date: 2021_8_19
ID: 3104fstf
Snippet: In Belgium, high-risk contacts of an infected person were offered PCR-testing irrespective of their vaccination status. We estimated vaccine effectiveness (VE) against infection and onwards transmission, controlling for previous infections, household-exposure and temporal trends. We included 301,741 tests from 25 January to 24 June 2021. Full-schedule vaccination was associated with significant protection against infection. In addition, mRNA-vaccines reduced onward transmission: VE-estimates inc
Document: In Belgium, high-risk contacts of an infected person were offered PCR-testing irrespective of their vaccination status. We estimated vaccine effectiveness (VE) against infection and onwards transmission, controlling for previous infections, household-exposure and temporal trends. We included 301,741 tests from 25 January to 24 June 2021. Full-schedule vaccination was associated with significant protection against infection. In addition, mRNA-vaccines reduced onward transmission: VE-estimates increased to >90% when index and contact were fully vaccinated. The small number of viral-vector vaccines included limited interpretability.
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