Changes in Care in Spanish Pediatric Emergency Departments After the First Immunization With Nirsevimab.

Objectives: The aim of the study is to assess the changes in the pediatric care of patients seen in the Pediatric Emergency Departments (PED) during the bronchiolitis season following the introduction of immunization with a monoclonal antibody against RSV (nirsevimab).

Methods: An observational, retrospective, multicenter study was conducted, analyzing the Bronchiolitis Registry of the Spanish Society of Pediatric Emergency Medicine. This registry, containing data on bronchiolitis cases, was initiated in December 2022.