Immunology is the study of the immune system and how it defends the body against disease. This book is an accessible introduction to the field, covering everything from the basic principles of immunology to the latest research in the field. Noble P. Sherwood provides a comprehensive overview of the subject that is suitable for students, researchers, and healthcare professionals alike.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.