How the Immune System Works has helped thousands of students understand what's in their hefty immunology textbooks. In this book, Dr. Sompayrac cuts through the jargon and details to reveal, in simple language, the essence of this complex subject: how the immune system fits together, how it protects us from disease and, perhaps most importantly, why it works the way it does. Featuring Dr. Sompayrac's hallmark lively prose and engaging analogies, How the Immune System Works has been rigorously updated for this sixth edition, including the latest information on subjects such as vaccines, immunological memory, and cancer. A highlight of this edition is a new chapter on immunotherapies - currently one of the hottest topics in immunology. Whether you are completely new to immunology, or require a refresher, How the Immune System Works will provide you with a clear and engaging overview of this fascinating subject.