{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T05:38:10Z","timestamp":1788586690130,"version":"build-2803163510"},"reference-count":27,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2025,2,14]],"date-time":"2025-02-14T00:00:00Z","timestamp":1739491200000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000805","name":"European Centre for Disease Prevention and Control","doi-asserted-by":"publisher","award":["ECD.13350"],"award-info":[{"award-number":["ECD.13350"]}],"id":[{"id":"10.13039\/501100000805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000805","name":"European Centre for Disease Prevention and Control","doi-asserted-by":"publisher","award":["ECD.15029"],"award-info":[{"award-number":["ECD.15029"]}],"id":[{"id":"10.13039\/501100000805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000805","name":"European Centre for Disease Prevention and Control","doi-asserted-by":"publisher","award":["ECD.13629"],"award-info":[{"award-number":["ECD.13629"]}],"id":[{"id":"10.13039\/501100000805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000805","name":"European Centre for Disease Prevention and Control","doi-asserted-by":"publisher","award":["ECD.14898"],"award-info":[{"award-number":["ECD.14898"]}],"id":[{"id":"10.13039\/501100000805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000805","name":"European Centre for Disease Prevention and Control","doi-asserted-by":"publisher","award":["ECD.16380"],"award-info":[{"award-number":["ECD.16380"]}],"id":[{"id":"10.13039\/501100000805","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Influenza Resp Viruses"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>In 2021, the Norwegian Institute of Public Health established temporary registry\u2010based surveillance of severe acute respiratory infections (SARI). We aimed to describe the surveillance system and evaluate selected attributes to inform the establishment of a permanent SARI surveillance system.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>SARI cases were defined using ICD\u201010 discharge codes from national health and administrative registries, including codes for acute upper or lower respiratory infection (URI and LRI), COVID\u201019, acute respiratory distress syndrome, pertussis or otitis media. Data from polymerase chain reaction (PCR) analyses were available for 10 respiratory pathogens including SARS\u2010CoV\u20102, influenza virus and respiratory syncytial virus (RSV). We included data from 28 September 2020 to 31 March 2024 and calculated the following parameters: the proportion of cases tested for SARS\u2010CoV\u20102, influenza virus and\/or RSV; time between admission and registration of a SARI\u2010related ICD\u201010 code; and proportion of cases with URI, LRI and COVID\u201019.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We identified 214,730 SARI cases, of whom 82%, 73% and 53% were tested for SARS\u2010CoV\u20102, influenza virus and RSV. Case peaks were predominantly driven by one or a combination of these pathogens. Median time between admission and a registered SARI diagnostic code was 5 (lower\u2013upper quartile 3\u201310) days. Nowcasting and alternative case definitions for SARI with COVID\u201019, influenza and RSV improved the timeliness. The ICD\u201010 codes for LRIs and COVID\u201019 captured only ~55% of the cases in the age group of 0\u201329\u2009years compared to the routine case definition, where URIs were included.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Registry\u2010based SARI surveillance provides timely data for handling epidemics of respiratory infections in Norway. We recommend establishing a permanent SARI surveillance system.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/irv.70080","type":"journal-article","created":{"date-parts":[[2025,2,14]],"date-time":"2025-02-14T06:50:21Z","timestamp":1739515821000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Registry\u2010Based Surveillance of Severe Acute Respiratory Infections in Norway During 2021\u20132024"],"prefix":"10.1111","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-1646-2492","authenticated-orcid":false,"given":"Elina","family":"Sepp\u00e4l\u00e4","sequence":"first","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5917-1563","authenticated-orcid":false,"given":"H\u00e5kon","family":"B\u00f8\u00e5s","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0369-9393","authenticated-orcid":false,"given":"Jesper","family":"Dahl","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8086-4244","authenticated-orcid":false,"given":"Jeanette","family":"St\u00e5lcrantz","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melanie","family":"Stecher","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"},{"name":"ECDC Fellowship Programme, Field Epidemiology Path (EPIET) European Centre for Disease Prevention and Control (ECDC)  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2671-0089","authenticated-orcid":false,"given":"Ragnhild","family":"T\u00f8nnessen","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"},{"name":"Department of Analysis and Diagnostics Norwegian Veterinary Institute  \u00c5s Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gunnar\u00a0\u00d8yvind\u00a0Isaksson","family":"R\u00f8","sequence":"additional","affiliation":[{"name":"Department of Method Development and Analytics Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hilde","family":"Kl\u00f8vstad","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Trine\u00a0Hessevik","family":"Paulsen","sequence":"additional","affiliation":[{"name":"Department of Infectious Disease Control and Vaccines Norwegian Institute of Public Health  Oslo 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