{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T21:27:35Z","timestamp":1771363655024,"version":"3.50.1"},"reference-count":45,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,1,24]],"date-time":"2023-01-24T00:00:00Z","timestamp":1674518400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pediatric Pulmonology"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Acute bronchiolitis\u00a0is the main cause of hospitalization in children under 2\u00a0years of age, with a regular seasonality, mostly due to the respiratory syncytial virus.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To describe the epidemiology of bronchiolitis hospitalizations in our center in the last 12\u00a0years, and analyze the changes in clinical characteristics, microbiology, and adverse outcomes during the SARS\u2010CoV\u20102 pandemic.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Observational study including patients admitted for bronchiolitis between April 2010 and December 2021 in a Spanish tertiary paediatric hospital. Relevant demographic, clinical, microbiological, and adverse outcome variables were collected in an anonymized database. The pandemic period (April 2020 to December 2021) was compared to 2010\u22122015 seasons using appropriate statistical tests.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There were 2138 bronchiolitis admissions, with a mean of 195.6 per year between 2010 and 2019 and a 2\u22124\u2010month peak between November and March. In the expected season of 2020, there was a 94.4% reduction of bronchiolitis hospitalizations, with only 11\u00a0cases admitted in the first year of the pandemic. Bronchiolitis cases increased from the summer of 2021 during a 6\u2010month long peak, reaching a total of 171 cases. Length of stay was significantly shorter during the pandemic, but no differences were found in clinical and microbiological characteristics or other adverse outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The SARS\u2010CoV\u20102 pandemic has modified the seasonality of bronchiolitis hospitalizations, with a dramatic decrease in cases during the expected season of 2020\u22122021, and an extemporaneous summer\u2212autumn peak in 2021 with longer duration but similar patient characteristics and risk factors.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ppul.26322","type":"journal-article","created":{"date-parts":[[2023,1,19]],"date-time":"2023-01-19T01:38:35Z","timestamp":1674092315000},"page":"1201-1209","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Bronchiolitis before and after the SARS\u2010CoV\u20102 pandemic: Twelve years of experience in a Spanish paediatric 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