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Immunovirological and environmental screening reveals actionable risk factors for fatal COVID-19 during post-vaccination nursing home outbreaks

  • Lize Cuypers
  • , Els Keyaerts
  • , Samuel Leandro Hong
  • , Sarah Gorissen
  • , Soraya Maria Menezes
  • , Marick Starick
  • , Jan Van Elslande
  • , Matthias Weemaes
  • , Tony Wawina-Bokalanga
  • , Joan Marti-Carreras
  • , Bert Vanmechelen
  • , Bram Van Holm
  • , Mandy Bloemen
  • , Jean Michel Dogne
  • , François E. Dufrasne
  • , Keith Durkin
  • , Jean Ruelle
  • , Ricardo de Mendonca
  • , Elke Wollants
  • , Pieter Vermeersch
  • Caroline Boulouffe, Achille Djiena, Caroline Broucke, Boudewijn Catry, Katrien Lagrou, Marc Van Ranst, Johan Neyts, Guy Baele, Piet Maes, Emmanuel André, Simon Dellicour, Johan Van Weyenbergh, COVID-19 Genomics Belgium Consortium

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Coronavirus Disease 2019 (COVID-19) vaccination has resulted in excellent protection against fatal disease, including in older adults. However, risk factors for post-vaccination fatal COVID-19 are largely unknown. We comprehensively studied three large nursing home outbreaks (20–35% fatal cases among residents) by combining severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) aerosol monitoring, whole-genome phylogenetic analysis and immunovirological profiling of nasal mucosa by digital nCounter transcriptomics. Phylogenetic investigations indicated that each outbreak stemmed from a single introduction event, although with different variants (Delta, Gamma and Mu). SARS-CoV-2 was detected in aerosol samples up to 52 d after the initial infection. Combining demographic, immune and viral parameters, the best predictive models for mortality comprised IFNB1 or age, viral ORF7a and ACE2 receptor transcripts. Comparison with published pre-vaccine fatal COVID-19 transcriptomic and genomic signatures uncovered a unique IRF3 low/IRF7 high immune signature in post-vaccine fatal COVID-19 outbreaks. A multi-layered strategy, including environmental sampling, immunomonitoring and early antiviral therapy, should be considered to prevent post-vaccination COVID-19 mortality in nursing homes.

Original languageEnglish
Pages (from-to)722-733
Number of pages12
JournalNature Aging
Volume3
Issue number6
DOIs
Publication statusPublished - Jun 2023
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

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