SALEEM, A. F. Age Appropriate Childhood Immunization and Catch-up Immunization, Pakistan. Infectious Diseases Journal of Pakistan, [S. l.], v. 26, n. 3, p. 36, 2023. Disponível em: https://ojs.idj.org.pk/index.php/Files/article/view/189. Acesso em: 19 dec. 2025.