This companion to IMMUNOLOGY 5TH EDITION, is designed to provide clear, clinical relevance to the science of immunology. All the main diseases covered in the parent textbook are covered in Case Studies in Immunology with 45 detailed case presentations. Each presentation is followed by 4-5 questions that are discussed in great detail. The cases are designed to reinforce the clinical relevance of immunology and to encourage the student in problem-based learning. Three new case studies have been added to reflect advances in immunology and to be consistent with Immunology Fifth Edition which has increased coverage of AIDS, nutrition, and immunity.