Mucosal nirsevimab levels in respiratory syncytial virus breakthrough bronchiolitis.

Lancet Infect Dis

CIRI-Centre International de Recherche en Infectiologie, Team GIMAP, Univ Lyon, Université Claude Bernard Lyon 1, Inserm, U1111, CNRS, UMR530, CIC 1408 Vaccinology, F42023 Saint-Etienne, France; Immunology Department, University Hospital of Saint-Etienne, Saint-Etienne, France. Electronic address:

Published: November 2024

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http://dx.doi.org/10.1016/S1473-3099(24)00600-5DOI Listing

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Mucosal nirsevimab levels in respiratory syncytial virus breakthrough bronchiolitis.

Lancet Infect Dis

November 2024

CIRI-Centre International de Recherche en Infectiologie, Team GIMAP, Univ Lyon, Université Claude Bernard Lyon 1, Inserm, U1111, CNRS, UMR530, CIC 1408 Vaccinology, F42023 Saint-Etienne, France; Immunology Department, University Hospital of Saint-Etienne, Saint-Etienne, France. Electronic address:

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Article Synopsis
  • RSV and HMPV are major causes of respiratory infections, especially in children, the elderly, and immunocompromised individuals, with a lack of approved treatments for HMPV and only palivizumab available for high-risk infants with RSV.* -
  • Using 3-D human airway tissues, the study found RSV spreads more efficiently than HMPV and predominantly infects apical ciliated cells, while each virus displays different characteristics in their infection processes.* -
  • Both palivizumab and nirsevimab inhibit RSV effectively, with nirsevimab showing greater potency, whereas 54G10 inhibited HMPV entry but not its spread, highlighting the distinct mechanisms of infection and treatment responses for each
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