{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T11:21:24Z","timestamp":1785410484770,"version":"3.56.0"},"reference-count":20,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T00:00:00Z","timestamp":1780012800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100004423","name":"World Health Organization","doi-asserted-by":"crossref","award":["CN 2020\/422-325"],"award-info":[{"award-number":["CN 2020\/422-325"]}],"id":[{"id":"10.13039\/100004423","id-type":"DOI","asserted-by":"crossref"}]},{"award":["CN 2020\/422-325"],"award-info":[{"award-number":["CN 2020\/422-325"]}],"id":[{"id":"https:\/\/ror.org\/01f80g185","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Vaccines"],"abstract":"<jats:p>Background: Vaccination coverage declined in many countries during the COVID-19 pandemic, including in Bosnia and Herzegovina. We evaluated a telephone-based outreach intervention implemented in primary healthcare facilities (PHCs) in the Federation of Bosnia and Herzegovina. The intervention targeted missed routine vaccinations among children aged 0\u20137 years. Method: Using a programmatic, non-randomized pre\u2013post design, healthcare teams reviewed registries to identify under-vaccinated children, and parents were contacted by phone to facilitate catch-up visits. Results: Among age-eligible children, vaccination coverage increased from 66.5% to 74.2% for measles\u2013mumps\u2013rubella (MMR) dose 1, from 43.4% to 51.7% for MMR dose 2, and from 50.4% to 55.9% for the fourth dose of diphtheria\u2013tetanus\u2013acellular pertussis-inactivated poliovirus\u2013Haemophilus influenzae type b vaccine (DTaP-IPV-Hib). Mixed-effects models adjusting for age, sex, and clustering by facility and canton showed higher odds of vaccination post-intervention for MMR dose 1 (adjusted odds ratio [aOR] 1.65), MMR dose 2 (aOR 1.61), and DTaP-IPV-Hib dose 4 (aOR 1.39; all p &lt; 0.001). Conclusions: These results show that registry-based, proactive outreach can yield significant improvements in routine childhood vaccination coverage in real-world settings and may be a scalable approach for decentralized health systems recovering from pandemic disruptions.<\/jats:p>","DOI":"10.3390\/vaccines14060483","type":"journal-article","created":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T11:25:31Z","timestamp":1780399531000},"page":"483","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Improving Routine Childhood Vaccination Coverage Through Registry-Driven Telephone Outreach: A Large Pre\u2013Post Study from the Federation of Bosnia and Herzegovina"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-3405-8166","authenticated-orcid":false,"given":"Stela","family":"Stojisavljevic","sequence":"first","affiliation":[{"name":"Country Office in Bosnia and Herzegovina, World Health Organization, 71000 Sarajevo, Bosnia and Herzegovina"},{"name":"Department of Public Health, Medical Faculty, University in Banja Luka, 78000 Banja Luka, Bosnia and Herzegovina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mirza","family":"Palo","sequence":"additional","affiliation":[{"name":"Country Office in Bosnia and Herzegovina, World Health Organization, 71000 Sarajevo, Bosnia and Herzegovina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8974-6607","authenticated-orcid":false,"given":"Faris","family":"Dizdar","sequence":"additional","affiliation":[{"name":"Independent Researcher, 71000 Sarajevo, Bosnia and Herzegovina"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1016\/S0140-6736(21)01337-4","article-title":"Estimating global and regional disruptions to routine childhood vaccine coverage during the COVID-19 pandemic in 2020: A modelling study","volume":"398","author":"Causey","year":"2021","journal-title":"Lancet"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Fukai, T., Kawata, K., and Nakabayashi, M. 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Internet Res."}],"container-title":["Vaccines"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2076-393X\/14\/6\/483\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T04:12:08Z","timestamp":1780459928000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2076-393X\/14\/6\/483"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,29]]},"references-count":20,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2026,6]]}},"alternative-id":["vaccines14060483"],"URL":"https:\/\/doi.org\/10.3390\/vaccines14060483","relation":{},"ISSN":["2076-393X"],"issn-type":[{"value":"2076-393X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,29]]}}}