There is a large and rapidly growing body of literature on the immunology in clinic practice. In this book, the authors have made an effort to brief descriptions of recent immunological developments in clinic practice. This book is not a textbook. All the chapters in the book are independent of each other; each is dedicated to a different clinic. To meet the needs of different readers, all chapters have a similar structure. Though the field of immunology has a wide range of research, we have tried to include the important developments in the book with examples and recent references. References are provided at the end of each chapter.