Operational research course on pediatric infectious diseases which was Organized by GID-Ethiopia ACIPH and Harvard University. The training was conducted from Nov 29- Dec 3, 2021. The aim of the course is to teach participants to develop the practical skills to conduct operational research, publish the findings and promote changes in policy and practice. The training was conducted at ACIPH Hall in Addis Ababa. The participants came from different universities, Hospitals, FMOH and NGO.