eJHaem (Aug 2021)

Safety and immunogenicity of a first dose of SARS‐CoV‐2 mRNA vaccine in allogeneic hematopoietic stem‐cells recipients

  • Patrice Chevallier,
  • Marianne Coste‐Burel,
  • Amandine Le Bourgeois,
  • Pierre Peterlin,
  • Alice Garnier,
  • Marie C. Béné,
  • Berthe‐Marie Imbert,
  • Thomas Drumel,
  • Steven Le Gouill,
  • Philippe Moreau,
  • Beatrice Mahe,
  • Viviane Dubruille,
  • Nicolas Blin,
  • Anne Lok,
  • Cyrille Touzeau,
  • Thomas Gastinne,
  • Maxime Jullien,
  • Sophie Vanthygem,
  • Thierry Guillaume

DOI
https://doi.org/10.1002/jha2.242
Journal volume & issue
Vol. 2, no. 3
pp. 520 – 524

Abstract

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Abstract This was a monocentric prospective study testing the efficacy and safety of a first injection of BNT162b2 (Pfizer‐BioNTech) in 112 Allo‐HSCT patients. Antibody response to SARS‐CoV‐2 spike protein receptor‐binding domain was tested at the time of the second injection (Roche Elecsys). The study also included a non‐randomized control arm of 26 healthy controls. This study shows that a first dose of SARS‐CoV‐2 messenger RNA vaccine is safe and provides a 55% rate of seroconversion in allotransplanted patients compared to 100% for the controls (p < 0.001). Factors influencing the absence of response in patients were recent transplantation (<2 years), lymphopenia (<1 × 109/L) and immunosuppressive treatment or chemotherapy at the time of vaccination.