Immunopathology examines diseases arising from dysfunctions in the immune system, including autoimmune disorders, immunodeficiencies, hypersensitivity reactions, and inflammatory conditions. The immune system's intricate balance between defense and tolerance is essential for maintaining health, and disruptions can lead to a variety of pathological states. Understanding the mechanisms behind these immune-related diseases is crucial for developing effective diagnostic and therapeutic strategies. This book provides a comprehensive overview of immune disorders, exploring the underlying genetic, molecular, and cellular factors.