By attending this session, students will gain a comprehensive understanding of the mechanisms of antigen-antibody interactions and their pivotal role in the immune system. They will learn how these interactions form the basis of diagnostic tests (e.g., ELISA, agglutination), vaccine development, and therapeutic strategies, such as monoclonal antibody treatments. Additionally, students will understand the clinical relevance of these interactions in diagnosing infections, autoimmune diseases, and allergies, as well as their application in blood typing and managing chronic diseases, providing a solid foundation for integrating immunology into routine medical practice.