Influenza vaccination for healthcare workers who care for people aged 60 or older living in long-term care institutions. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 29, n. 5, p. 339–40, 2013. DOI: 10.32385/rpmgf.v29i5.11171. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/11171. Acesso em: 17 apr. 2026.