Effectiveness of the influenza vaccine in 2010-2011 in Portugal: Results from the EUROEVA project. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 28, n. 4, p. 271–84, 2012. DOI: 10.32385/rpmgf.v28i4.10955. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10955. Acesso em: 18 apr. 2026.