{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T19:36:50Z","timestamp":1792870610463,"version":"4.5.0"},"reference-count":17,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Medical Virology"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:label\/>\n                    <jats:p>Post\u2010pandemic influenza dynamics have shown unusual patterns globally. We investigated the re\u2010emergence and recurrent seasonal dominance of influenza B in Korea across three post\u2010pandemic seasons (2022\u22122026). We analyzed 157 consecutive weeks of national sentinel surveillance data (K\u2010SenS, Korea Disease Control and Prevention Agency), covering September 2022 to August 2025, plus preliminary data through Week 10 of 2026. Influenza B predominance was defined as weeks with &gt;\u200950% influenza B among total influenza detections; a sensitivity analysis required overall influenza activity &gt;\u20095%. Influenza B activity remained minimal during the 2022\u221223 season (mean proportion 3.3%; peak 25.3%) and never reached predominance. Two complete predominance episodes followed influenza A epidemics: after the 2023\u221224 epidemic (co\u2010circulating A\/H1N1pdm09 and A\/H3N2; peak ILI 61.3\/1000), B predominance began January 2024 and persisted 23 weeks (peak 100%); after the 2024\u221225A\/H1N1pdm09\u2010dominant epidemic (peak ILI 99.8\/1000), it began February 2025 and accumulated 20 weeks over two periods with a brief interruption (peak 100%). Onset occurred 5\u22128 weeks after the influenza A peak by ILI (6\u22128 weeks virologically) in all three episodes, unaffected by threshold choice. A third episode following the 2025\u221226A\/H3N2 epidemic was ongoing as of March 2026 (onset 7 weeks after the A peak). In post\u2010pandemic Korea, influenza B repeatedly established seasonal dominance 5\u22128 weeks after influenza A epidemics across three consecutive seasons. This recurring temporal pattern may have implications for influenza surveillance, clinical preparedness, and vaccine strategy, though its underlying mechanism remains unestablished.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jmv.71169","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T11:06:42Z","timestamp":1790248002000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Recurring Temporal Association Between Influenza A Epidemics and Subsequent Influenza B Dominance in Post\u2010Pandemic Korea, 2022\u22122026"],"prefix":"10.1002","volume":"98","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9521-3575","authenticated-orcid":false,"given":"Yoon","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Pediatrics, Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoonsun","family":"Yoon","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Guro Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ji Eun","family":"Park","sequence":"additional","affiliation":[{"name":"Global Child Health Institute Korea University Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3178-8569","authenticated-orcid":false,"given":"Won Keun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Microbiology Hallym University College of Medicine Chuncheon Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8749-0951","authenticated-orcid":false,"given":"Youn Young","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"},{"name":"Global Child Health Institute Korea University Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4396-8671","authenticated-orcid":false,"given":"Yun\u2010Kyung","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Ansan Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5670-3635","authenticated-orcid":false,"given":"Changmin","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"},{"name":"Allergy and Immunology Center Korea University Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3354-6969","authenticated-orcid":false,"given":"Young","family":"Yoo","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"},{"name":"Allergy and Immunology Center Korea University Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2733-0715","authenticated-orcid":false,"given":"Young June","family":"Choe","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"},{"name":"Global Child Health Institute Korea University Seoul Republic of Korea"},{"name":"Allergy and Immunology Center Korea University Seoul Republic of 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