Impact of the COVID-19 pandemic on routine childhood immunisation coverage and timeliness in Switzerland: a retrospective analysis using data from the Swiss National Vaccination Coverage Survey, 2019–2023. Swiss Med Wkly [Internet]. 2025 Dec. 17 [cited 2025 Dec. 22];155(12):4525. Available from: https://smw.ch/index.php/smw/article/view/4525