ENH 227A/ENH 205A is an introductory course in Immunology taught to the students taking public Health course at Daystar University. Basic definitions and concepts on immunity are covered. Towards the end of the course, topics on cytokines, autoimmunity and hypersensitivity are covered in details.  The online teaching of this course is meant to supplement and summarize the face to face teaching that has been going on for the last 11 weeks starting from January 2021. This online teaching is also meant to prepare students for online examination which commences on 12th April, 2021.