Invasive pneumococcal disease in Spain. Period 2015-2021. Boletín Epidemiológico Semanal, Madrid, v. 31, n. 1, p. 23–36, 2023. Disponível em: https://revista.isciii.es/index.php/bes/article/view/1284. Acesso em: 16 sep. 2026.