Strictly speaking, clinical immunology is not a medical specialty. Its compass is much too wide. One can hardly expect rheumatologists to relinquish their franchise on rheumatoid arthritis, endocrinologists to give up their hold on thyrotoxicosis, hematologists to part with hemolytic anemia, oncologists with multiple myeloma, allergists with allergic pneumonitis, or neurologists with myasthenia gravis just because immune mechanisms play an important role in these conditions. Hence the 22 contributors to the book's three chapters review these and other topics not in the framework of a specialty, but in that of a discipline that aids physicians and surgeons in understanding disorders of fundamental immunologic processes and their correction as they relate to a wide range of diseases. This updated review will be read with interest by physicians regardless of their specialties.