Recruitment of babies in vaccine trial: A challenge. Indian Journal of Child Health, [S. l.], v. 6, n. 8, p. 424–427, 2019. DOI: 10.32677/IJCH.2019.v06.i08.007. Disponível em: https://mansapublishers.com/index.php/ijch/article/view/1721.. Acesso em: 27 jun. 2024.