Cristianne Confessor Castilho LopesVitor Ohana Marques AzziniNatascha Szumsztajn BekerR. SantiagoSandra Maria Alves de Sousa LimaClaudio Rodrigo Maia SantosJosé Francisco DalcinMarilda Moraes da CostaLívia Strital DefáveriPatrícia Cota Lima2026-03-222026-03-22202310.47191/ijmscrs/v3-i11-55https://doi.org/10.47191/ijmscrs/v3-i11-55https://andeanlibrary.org/handle/123456789/74348Introduction: Acute bronchiolitis is almost exclusively caused by viral infection in children under 2 years of age. It is a secondary inflammatory viral infection of the lower airways, causing obstruction of the lower respiratory tract. Objective: Review the literature to verify the main causes of viral bronchiolitis in babies. Methods: This study constitutes a systematic review, classified as exploratory and descriptive. The preparation of the research was a bibliographical search in electronic databases on methods associated with RSL (Systematic Literature Review) and the applications of SMARTER (Simple Multi-Attribute Rating Technique using Exploiting Rankings). Results: A comprehensive systematic search of the literature yielded a total of 439 articles referring to the main causes of bronchiolitis in infants. Of these, 29 articles were eligible to be included in this systematic review. Conclusion: The study concluded that bronchiolitis research has seen a significant increase in research and publications, but further investigation is needed to improve our understanding and management of this condition.enBronchiolitisSystematic reviewViral infectionMedicineIntensive care medicinePediatricsMEDLINEarticle