{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T20:59:37Z","timestamp":1792616377463,"version":"4.5.0"},"reference-count":33,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T00:00:00Z","timestamp":1774396800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T00:00:00Z","timestamp":1774396800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100010686","name":"Folkh\u00e4lsomyndigheten","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100010686","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Paediatrica"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>Countries with varicella immunisation programmes have seen major reductions in disease burden. While two\u2010dose schedules are now universally adopted, dosing ages vary, and some countries initially include catch\u2010up vaccination of older children to speed impact. This modelling study assessed three two\u2010dose schedules in the Swedish setting (1) 12 and 18\u2009months, (2) 18\u2009months and 5\u2009years, and (3) 18\u2009months and 7\u2009years, with and without catch\u2010up of susceptible children based on their medical history.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A deterministic, compartmental, age\u2010structured, dynamic transmission model was used to evaluate the different strategies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>With coverage similar to other childhood vaccinations in Sweden (\u2265\u200995%) but no catch\u2010up, varicella cases are projected to decrease significantly within four years of programme start for all schedules modelled. However, a temporary rebound may occur around years 4\u20137 due to accumulating susceptibles before subsiding. Adding catch\u2010up vaccination in this high\u2010coverage setting accelerates and sustains the decline, with varicella disease burden significantly reduced within 2\u20133\u2009years.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>A national childhood varicella programme in Sweden could cut transmission and disease burden within 4\u2009years, with catch\u2010up vaccination speeding this to a few years and lowering rebound risk. The schedule should be guided by programmatic considerations.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/apa.70487","type":"journal-article","created":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T04:50:44Z","timestamp":1774500644000},"page":"2525-2532","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Modelling Impact of Different Varicella Immunisation Strategies Upon Introduction in the Swedish National Programme"],"prefix":"10.1111","volume":"115","author":[{"given":"Gianpaolo Scalia","family":"Tomba","sequence":"first","affiliation":[{"name":"Department of Mathematics University of Rome Tor Vergata  Rome Italy"},{"name":"Department of Mathematics Stockholm University  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frida","family":"Kasteng","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annika","family":"Ersson","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S\u00f6ren","family":"Andersson","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"},{"name":"School of Medical Sciences, Faculty of Medicine and Health \u00d6rebro University  \u00d6rebro Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7058-2419","authenticated-orcid":false,"given":"Emma","family":"Appelqvist","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marie","family":"Nordahl","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kari","family":"Johansen","sequence":"additional","affiliation":[{"name":"Department of Public Health Analysis and Data Management Public Health Agency of Sweden  Solna Sweden"},{"name":"Department of Global Public Health Karolinska Institutet  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,3,25]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(74)90144-5"},{"key":"e_1_2_13_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/infdis\/174.Supplement_3.S310"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.vaccine.2016.04.059"},{"key":"e_1_2_13_5_1","unstructured":"World Health Organization \u201cIntroduction of Varicella vaccine 2024 \u201dhttps:\/\/immunizationdata.who.int\/global\/wiise\u2010detail\u2010page\/introduction\u2010of\u2010varicella\u2010vaccine?ISO_3_CODE=&YEAR=."},{"issue":"4","key":"e_1_2_13_6_1","first-page":"1","article-title":"Prevention of Varicella: Recommendations of the Advisory Committee on Immunization Practices (ACIP)","volume":"56","author":"Marin M.","year":"2007","journal-title":"Morbidity and Mortality Weekly Report. 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