Richard, Jean-Luc, Mirjam Mäusezahl, Sabine Basler, and Nadine Eckert. “Approaching Measles Elimination in Switzerland: Changing Epidemiology 2007–2018”. Swiss Medical Weekly 149, no. 2324 (June 11, 2019): w20102. Accessed April 24, 2024. https://smw.ch/index.php/smw/article/view/2630.