Subjects
This study included children aged less than 2 years of age who were hospitalized between January 2018 and March 2022 due to acute bronchiolitis, with a positive RT-PCR for RSV on a nasal swab during the first week since admission and a CRP level measurement taken during the first 72 hours from admission. The exclusion criteria were major genetic or chromosomal abnormalities, immunodeficiencies, cyanotic heart conditions, neurologic diseases, hypotonia, and chronic lung diseases.