Introduces components and functions of human immune system with application to infectious disease, organ transplantation and cancer. Additionally, conditions involving the immune system such as immunodeficiencies (including AIDS), allergies and autoimmune diseases are covered. This is an upper-level elective course for Biology and Allied Health Science majors. The prerequisite is BIOLOGY 271; a background in biochemistry, genetics or medical bacteriology is recommended. Three hours of lecture and discussion per week. Not offered every semester.