Today on (Oct 26, 2022) in the presence of the head of departments and lecturer a symposium entitled (Immune response to diseases), was presented by Assitant Lecturer (Ms. Hiwa Rajab Ibrahim) from the medical laboratory department, where it has been explained that Immune response is a defense mechanism of the body against pathogens like bacteria parasites and viruses. The human body has three lines of defense mechanism; physical and chemical barrier, cellular and humoral mediated immunity. , At the end of the symposium, a set of questions and answers were raised on this subject