The primary aim of this course is to equip students with a solid understanding of fundamental immunology processes and the intricate interactions within the immune system. It begins by defining the vital role the immune system plays in protecting the body and delves into the basic biology of both innate and adaptive immunity. The course will provide students with in-depth knowledge of the diverse players in the immune system, including cells, tissues, and soluble molecules. It will also explore the fundamental principles of antigen-antibody interactions, unveiling the fascinating dance of recognition and attack. Further exploration will take us to the critical roles of mucosal immunity and immunological memory, while examining the factors influencing immune tolerance.