Overview and evaluation of a nationwide hospital-based surveillance system for influenza and COVID-19 in Switzerland (CH-SUR): 2018–2023. Swiss Medical Weekly, [S. l.], v. 155, n. 11, p. 4213, 2025. DOI: 10.57187/s.4213. Disponível em: https://smw.ch/index.php/smw/article/view/4213. Acesso em: 20 nov. 2025.