In this book readers delve into the profound evolution of this critical field, tracing its origins from the early 20th century to its current status as an interdisciplinary cornerstone. This comprehensive book covers the fusion of immunology with various domains such as microbiology, biochemistry, molecular biology, biotechnology, zoology, clinical medicine, and pathology. Designed to align with the changing approach towards immunology, it places significant emphasis on molecular aspects, paving the way for new treatments and diagnostic methods for complex diseases, including cancer. Unique to this text are pioneering chapters on immunological synapse, molecular immunology, immunohistochemistry, and tumor immunology, reflecting the latest advancements. The content is presented in a clear, accessible manner, ensuring it caters to both students and educators in life sciences. With up-to-date information and essential illustrations, this book is a key resource for understanding the intricate and ever-evolving world of immunology, affirming its critical role in life sciences. Whether for academic pursuit or professional growth, "Immunology" stands as an invaluable guide for exploring the dynamic interplay of biology and medicine.