During our study tour that brought together Indonesia, Sri Lanka, and Vietnam to explore the role of effective management and supportive supervision in the delivery of Expanded Programme on Immunisation (EPI) services, Dr. Thejaka Siriwardena, Ministry of Health, Sri Lanka, sat down with immunisation experts, Dr. Nguyen Thi Thu Huong, National Institute of Hygiene and Epidemiology, Viet Nam, and Junghans Sitorus, Ministry of Health, Indonesia, to learn about the rich lessons and strategies that emerged from the study tour. This Practitioner Perspectives video interview was conducted in English.