A stacked ensemble machine learning model for the prediction of pentavalent 3 vaccination dropout in East Africa. - Meron Asmamaw Alemayehu; Shimels Derso Kebede; Agmasie Damtew Walle; Daniel Niguse Mamo; Ermias Bekele Enyew; Jibril Bashir Adem (Frontiers Big Data, 2025)