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Virological characteristics of SARS-CoV-2 vaccine breakthrough infections in health care workers
Marc Conrad Shamier; Alma Tostmann; Susanne Bogers; Janet De Wilde; Jeroen IJpelaar; Willemijn Van Der Kleij; Herbert De Jager; Bart Haagmans; Richard Molenkamp; Bas Oude Munnink; Carsten van Rossum; Janette Rahamat-Langendoen; Nannet Van Der Geest; Chantal Bleeker-Rovers; Heiman Wertheim; Marion Koopmans; Corine GeurtsvanKessel.
Afiliação
  • Marc Conrad Shamier; Erasmus Medical Center
  • Alma Tostmann; Radboud Centre for Infectious Diseases, Radboud university medical centre
  • Susanne Bogers; Erasmus Medical Center
  • Janet De Wilde; Erasmus Medical Center
  • Jeroen IJpelaar; Erasmus Medical Center
  • Willemijn Van Der Kleij; Erasmus Medical Center
  • Herbert De Jager; Erasmus Medical Center
  • Bart Haagmans; Erasmus Medical Center
  • Richard Molenkamp; Erasmus Medical Center
  • Bas Oude Munnink; Erasmus Medical Center
  • Carsten van Rossum; Radboud university medical center
  • Janette Rahamat-Langendoen; Radboud university medical center
  • Nannet Van Der Geest; Radboud university medical center
  • Chantal Bleeker-Rovers; Radboud university medical center
  • Heiman Wertheim; Radboud university medical center
  • Marion Koopmans; Erasmus Medical Center
  • Corine GeurtsvanKessel; Erasmus Medical Center
Preprint em Inglês | medRxiv | ID: ppmedrxiv-21262158
ABSTRACT
BackgroundSARS-CoV-2 vaccines are highly effective at preventing COVID-19-related morbidity and mortality. As no vaccine is 100% effective, breakthrough infections are expected to occur. MethodsWe analyzed the virological characteristics of 161 vaccine breakthrough infections in a population of 24,706 vaccinated healthcare workers (HCWs), using RT-PCR and virus culture. ResultsThe delta variant (B.1.617.2) was identified in the majority of cases. Despite similar Ct-values, we demonstrate lower probability of infectious virus detection in respiratory samples of vaccinated HCWs with breakthrough infections compared to unvaccinated HCWs with primary SARS-CoV-2 infections. Nevertheless, infectious virus was found in 68.6% of breakthrough infections and Ct-values decreased throughout the first 3 days of illness. ConclusionsWe conclude that rare vaccine breakthrough infections occur, but infectious virus shedding is reduced in these cases.
Licença
cc_by_nd
Texto completo: Disponível Coleções: Preprints Base de dados: medRxiv Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
Texto completo: Disponível Coleções: Preprints Base de dados: medRxiv Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
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