The physician-scientist and immunologist chronicles his six decades of public service, including his work during the AIDS crisis and the Covid-19 pandemic.

The book that serves as the basis for the popular “Harrison’s Podclass” podcast series! This outstanding collection of internal medicine Q&A is perfect for prepping for board or shelf exams, getting in multiple “reps” of self directed learning, and increasing your understanding of clinical reasoning. It’s packed with 1,000+ high-quality clinical vignettes, with expert, on-point explanations for correct and incorrect answers. Harrison’s Principles of Internal Medicine Self-Assessment and Board Review reflects all the specialties of internal medicine, and has been exhaustively revised and updated to reflect hundreds of never-before published Q&A in board-style format. This great resource will bolster your understanding of pathophysiology, epidemiology, differential diagnosis, clinical decision making, and therapeutics. Illustrations, radiographs, and pathology slides are included throughout. Each question is accompanied by a complete answer and explanation, and cross-referenced to Harrison’s Principles of Internal Medicine for deeper-dive understanding. 325 full-color photos and illustrations Clinical vignettes and Q&A presented in board-style format Content consistent with board exam blueprint in internal medicine Aligned with Harrison’s Principles of Internal Medicine, the global authority in medicine Explanations for correct and incorrect answer choices

Publisher’s Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. All the authority of the most trusted brand in medical content in a convenient, portable guide Derived from most clinically salient content featured in Harrison’s Principles of Internal Medicine, 20th Edition, this full color, portable guide covers all diseases and conditions commonly seen in general medical practice. This edition has been updated to reflect the latest clinical developments in medicine. Designed for quick access and employing an effective blend of concise text, bulleted key points, decision trees, and summary tables, the Manual makes it easy to find what you need at the point of care. The easy-to-navigate chapters use a standard repeating template and cover: •Etiology and Epidemiology •Clinically Relevant Pathophysiology •Signs and Symptoms •Differential Diagnosis •Physical and Laboratory Findings •Therapeutics •Practice Guidelines, and more

SPECIAL OFFER! SAVE WHEN YOU PURCHASE HARRISON’S PRINCIPLES OF INTERNAL MEDICINE, 19e ALONG WITH THE COMPANION HARRISON’S MANUAL! This dollar-saving Harrison’s bundle includes these two great resources: Harrison’s Principles of Internal Medicine, Nineteenth Edition Through six decades, no resource has matched the authority, esteemed scholarship, and scientific rigor of Harrison’s Principles of Internal Medicine. Capturing the countless advances and developments across the full span of medicine, the 19th edition of Harrison’s provides a complete update of essential content related to disease pathogenesis, clinical trials, current diagnostic methods and imaging approaches, evidence-based practice guidelines, and established and newly approved treatment methods. Here are just a few of the outstanding features of the Nineteenth Edition:•Presented in two volumes: Volume 1 is devoted to foundational principles, cardinal manifestations of disease and approach to differential diagnosis; Volume 2 covers disease pathogenesis and treatment•NEW chapters on important topics such as Men’s Health, The Impact of Global Warming on Infectious Diseases, Fatigue, and many more•Critical updates in management and therapeutics in Hepatitis, Coronary Artery Disease, Ebola Virus Disease, Multiple Sclerosis, Diabetes, Hypertension, Deep Vein Thrombosis and Pulmonary Embolism, Acute and Chronic Kidney Disease, Inflammatory Bowel Disease, Lipoprotein Disorders, HIV and AIDS, and more.•Increased number of the popular Harrison’s clinical algorithms; clinically relevant radiographic examples spanning hundreds of diseases; clinical-pathological images in full color; crystal clear, full color drawings and illustrations and helpful tables and summary lists that make clinical application of the content faster than ever•Access to outstanding multi-media resources including practical videos demonstrating essential bedside procedures, physical examination techniques, endoscopic findings, cardiovascular findings, and more The package also includes….. Harrison’s Manual of Medicine, Nineteenth Edition Harrison’s Manual of Medicine is a concise, bedside resource derived from content found in Harrison’s Principles of Internal Medicine, Nineteenth Edition. Perfect for use at the point of care, the Manual presents clinical information covering key aspects of the diagnosis, clinical manifestations, and treatment of the major diseases that are likely to be encountered in medical practice. Presented in full color and incorporating an efficient blend of succinct text, bullet points, algorithms, and tables Harrison’s Manual of Medicine, Nineteenth Edition covers every area of clinical medicine, including:• Etiology and Epidemiology• Clinically Relevant Pathophysiology• Signs and Symptoms• Differential Diagnosis• Physical and Laboratory Findings• Therapeutics• Practice Guidelines

SPECIAL OFFER! SAVE WHEN YOU PURCHASE HARRISON’S PRINCIPLES OF INTERNAL MEDICINE SELF-ASSESSMENT AND BOARD REVIEW ALONG WITH THE COMPANION HARRISON’S MANUALThis dollar-saving Harrison’s bundle includes two great resources:Harrison’s Principles of Internal Medicine Self-Assessment and Board ReviewBased on the content of Harrison’s Principles of Internal Medicine, Nineteenth Edition, this full-color study aid is essential for Internal Medicine Board certification or recertification/maintenance of certification, or as a refresher for any internal medicine examination.Reflecting the accuracy, currency, and wide scope of Harrison’s, this complete review of internal medicine delivers more than 1,000 extremely challenging review questions, many of which utilize realistic patient scenarios, including radiographic and pathologic images. Each question is accompanied by explanations for correct and incorrect answers. These explanations — which are derived from and cross-referenced to Harrison’s Principles of Internal Medicine, Nineteenth Edition – are one of the most effective ways to learn and teach internal medicine. They are designed to bolster your understanding of pathophysiology, epidemiology, differential diagnosis, clinical decision making, and therapeutics. You will also find a beautiful full-color atlas.The package also includes…..Harrison’s Manual of Medicine, Nineteenth Edition Harrison’s Manual of Medicine is a concise, bedside resource derived from content found in Harrison’s Principles of Internal Medicine, Nineteenth Edition. Perfect for use at the point of care, the Manual presents clinical information covering key aspects of the diagnosis, clinical manifestations, and treatment of the major diseases that are likely to be encountered in medical practice.Presented in full color and incorporating an efficient blend of succinct text, bullet points, algorithms, and tables Harrison’s Manual of Medicine, Nineteenth Edition covers every area of clinical medicine, including:• Etiology and Epidemiology• Clinically Relevant Pathophysiology• Signs and Symptoms• Differential Diagnosis• Physical and Laboratory Findings• Therapeutics• Practice Guidelines

Infectious Diseases – as only Harrison’s can cover them A Doody’s Core Title for 2017! Featuring a superb compilation of chapters related to infectious diseases derived from Harrison’s Principles of Internal Medicine, Nineteenth Edition (including content from the acclaimed Harrison’s DVD, now available here in print), this concise, full-color clinical companion delivers the latest knowledge in the field backed by the scientific rigor and authority that have defined Harrison’s. You will find 137 chapters from more than 190 renowned editors and contributors in a carry-anywhere presentation that is ideal for the classroom, clinic, ward, or exam/certification preparation. Features: • Current, complete coverage of need-to-know topics, including infections in organ systems, bacterial infections, viral infections, prion diseases, fungal infections, and protozoal infections • Addresses underlying epidemiologic, pathophysiologic, and genetic factors • Integration of pathophysiology with clinical management • Includes special update on Zika virus etiology, clinical manifestations, and complications • The chapter on HIV infections and AIDS by Anthony Fauci and Dr. H. Clifford Lane is widely considered to be a classic in the field • Two chapters comprise atlases of images that will prove invaluable in clinical assessments • High-yield board review questions make this text ideal for keeping current and preparing for the boards • Helpful appendix of laboratory values of clinical importance

Gastroenterology and Hepatology – with all the authority of Harrison’s A Doody’s Core Title for 2020! Featuring a superb compilation of chapters related to gastroenterology and hepatology derived from Harrison’s Principles of Internal Medicine, Nineteenth Edition (including content from the acclaimed Harrison’s DVD, now available here in print), this concise, full-color clinical companion delivers the latest knowledge in the field backed by the scientific rigor and authority that have defined Harrison’s. You will find 63 chapters from more than 80 renowned editors and contributors in a carry-anywhere presentation that is ideal for the classroom, clinic, ward, or exam/certification preparation. FEATURES • Coverage includes: cardinal manifestations of disease, evaluation of the patient, disorders of the alimentary tract, infections of the alimentary tract, disorders of the liver and biliary tree, liver transplantation, disorders of the pancreas, neoplastic diseases of the gastrointestinal system, nutrition, and obesity and eating disorders • Reflects the most current advances in genetics, cell biology, pathophysiology, and treatment • Integration of pathophysiology with clinical management • High-yield board review questions make this text ideal for keeping current and preparing for the boards • Helpful appendix of laboratory values of clinical importance

Rheumatology – as only Harrison’s can cover it A Doody’s Core Title for 2017! Featuring a superb compilation of chapters related to rheumatology derived from Harrison’s Principles of Internal Medicine, Nineteenth Edition (including content from the acclaimed Harrison’s DVD, now available here in print), this concise, full-color clinical companion delivers the latest knowledge in the field backed by the scientific rigor and authority that have defined Harrison’s. You will find 24 chapters from more than 35 renowned editors and contributors in a carry-anywhere presentation that is ideal for the classroom, clinic, ward, or exam/certification preparation. FEATURES • Current, thorough coverage of important immunology and rheumatology topics, including the immune system in health and disease, disorders of immune-mediated injury, and disorders of the joints and adjacent tissues • Delivers insights designed to reduce pain, lesson joint and organ damage, and improve overall patient outcomes • Integrates pathophysiology with clinical management • High-yield board review questions make this text ideal for keeping current and preparing for the boards • Helpful appendix of laboratory values of clinical importance

Essential Clinical Information Drawn From Harrison’s Harrison’s Manual of Medicine is a concise, bedside resource derived from content found in Harrison’s Principles of Internal Medicine, Nineteenth Edition. Perfect for use at the point of care, the Manual presents clinical information covering key aspects of the diagnosis, clinical manifestations, and treatment of the major diseases that are likely to be encountered in medical practice. Presented in full color and incorporating an efficient blend of succinct text, bullet points, algorithms, and tables Harrison’s Manual of Medicine, Nineteenth Edition covers every area of clinical medicine, including: · Etiology and Epidemiology · Clinically Relevant Pathophysiology · Signs and Symptoms · Differential Diagnosis · Physical and Laboratory Findings · Therapeutics · Practice Guidelines

The landmark guide to internal medicine— updated and streamlined for today’s students and clinicians The only place you can get ALL the great content found in the two print volumes AND the acclaimed DVD in one convenient resource! Through six decades, no resource has matched the authority, esteemed scholarship, and scientific rigor of Harrison’s Principles of Internal Medicine. Capturing the countless advances and developments across the full span of medicine, the new 19th edition of Harrison’s provides a complete update of essential content related to disease pathogenesis, clinical trials, current diagnostic methods and imaging approaches, evidence-based practice guidelines, and established and newly approved treatment methods. Here are just a few of the outstanding features of the new Nineteenth Edition: Content is practically organized around two basic themes: education and clinical practice The teaching and learning sections cover foundational principles, cardinal manifestations of disease and approach to differential diagnosis; the content devoted to clinical practice focuses on disease pathogenesis and treatment NEW chapters on important topics such as Men’s Health, The Impact of Global Warming on Infectious Diseases, Fatigue, and many more Critical updates in management and therapeutics in Hepatitis, Coronary Artery Disease, Ebola Virus Disease, Multiple Sclerosis, Diabetes, Hypertension, Deep Vein Thrombosis and Pulmonary Embolism, Acute and Chronic Kidney Disease, Inflammatory Bowel Disease, Lipoprotein Disorders, HIV and AIDS, and more. Increased number of the popular Harrison’s clinical algorithms; clinically relevant radiographic examples spanning hundreds of diseases; clinical-pathological images in full color; crystal clear, full color drawings and illustrations and helpful tables and summary lists that make clinical application of the content faster than ever Outstanding multi-media resources including practical videos demonstrating essential bedside procedures, physical examination techniques, endoscopic findings, cardiovascular findings, are available for easy download Supporting the renowned coverage are supplemental resources that reflect and assist modern medical practice: more than 1,000 full-color photographs to aid visual recognition skills, hundreds of state-of-the-art radiographs, from plain film to 3D CT to PET Scans; beautiful illustrations that bring applied anatomy and processes to life; the renowned Harrison’s patient-care algorithms, essential summary tables, and practical demonstrative videos. In addition, several digital atlases highlight noninvasive imaging, percutaneous revascularization, gastrointestinal endoscopy, diagnosis and management of vasculitis, and numerous other issues commonly encountered in clinical practice. Acclaim for Harrison’s: “Covering nearly every possible topic in the field of medicine, the book begins with a phenomenal overview of clinical medicine, discussing important topics such as global medicine, decision-making in clinical practice, the concepts of disease screening and prevention, as well as the importance of medical disorders in specific groups (e.g. women, surgical patients, end of life). The extensive chapters that follow focus on a symptom-based presentation of disease and then illness organized by organ system. Numerous tables, graphs, and figures add further clarity to the text.” …Written by experts in the field, this book is updated with the latest advances in pathophysiology and treatment. It is organized in a way that makes reading from beginning to end a logical journey, yet each chapter can stand alone as a quick reference on a particular topic. “ Doody’s Review Service reviewing the previous edition of Harrison’s

Rheumatology – as only Harrison’s can cover it Featuring a superb compilation of chapters on rheumatology that appear in Harrison’s Principles of Internal Medicine, Eighteenth Edition, this concise, full-color clinical companion delivers the latest knowledge in the field backed by the scientific rigor and authority that have defined Harrison’s. You will find content from renowned editors and contributors in a carry-anywhere presentation that is ideal for the classroom, clinic, ward, or exam/certification preparation. Features Current, thorough coverage of important immunology and rheumatology topics, including the immune system in health and disease, disorders of immune-mediated injury, and disorders of the joints and adjacent tissues Delivers insights designed to reduce pain, lesson joint and organ damage, and improve overall patient outcomes Integrates pathophysiology with clinical management 75 high-yield questions and answers drawn from Harrison’s Principles of Internal Medicine Self-Assessment and Board Review, 18e Content updates and new developments since the publication of Harrison’s Principles of Internal Medicine, 18e 24 chapters written by physicians who are recognized experts in the field of rheumatology Helpful appendix of laboratory values of clinical importance

Infectious Diseases – as only Harrison’s can cover it Featuring a superb compilation of chapters related to infectious diseases that appear in Harrison’s Principles of Internal Medicine, Eighteenth Edition, this concise, full-color clinical companion delivers the latest knowledge in the field backed by the scientific rigor and authority that have defined Harrison’s. You will find content from renowned editors and contributors in a carry-anywhere presentation that is ideal for the classroom, clinic, ward, or exam/certification preparation. Features Current, complete coverage of need-to-know topics, including infections in organ systems, bacterial infections, viral infections, prion diseases, fungal infections, and protozoal infections Addresses underlying epidemiologic, pathophysiologic, and genetic factors Important material on HIV infections and AIDS by Anthony S. Fauci and H. Clifford Lane Two image-based chapters comprise atlases valuable to clinical assessment: rashes associated with fever and blood smears of the various stages of the parasites causing malaria and babesiosis Integration of pathophysiology with clinical management 121 high-yield questions and answers drawn from Harrison’s Principles of Internal Medicine Self-Assessment and Board Review, 18e Content updates and new developments since the publication of Harrison’s Principles of Internal Medicine, 18e 132 chapters written by physicians who are recognized experts in the field of infectious diseases Helpful appendix of laboratory values of clinical importance

Antibody Production in Man: In Vitro Synthesis and Clinical Implications is composed of the proceedings of the Catharijne Conference on immunology held in Utrecht, Holland on March 15-18, 1978. The conference focuses on the in vitro induction and regulation of immunoglobulin and antibody synthesis by human lymphocytes. It aims to present, analyze, exchange, and criticize data among the different investigators and to attempt to resolve apparent inconsistencies and contradictions. The book first discusses the mitogen- and antigen-induced B-cell activation. It then explains the subpopulations of lymphocytes involved in the regulation of in vitro B-cell function and the clinical implications in the study of in vitro B-cell function. This book reflects the stimulation as well as the frustration during the workshop. It will serve as a small force and focus of direction in this most interesting, complex, and relevant area of human immunobiology.

The authority of Harrison’s in a concise, carry-anywhere text Drawn from the eighteenth edition of Harrison’s Principles of Internal Medicine, this handy reference covers key aspects of the diagnosis, clinical manifestations, and treatment of the major diseases that are likely to be encountered in medical practice. Presented in full color and completely updated to reflect all the major advances and clinical developments, Harrison’s Manual of Medicine, 18e offers high-yield coverage of: Etiology and Epidemiology Clinically Relevant Pathophysiology Signs & Symptoms Differential Diagnosis Physical and Laboratory Findings Therapeutics Practice Guidelines Utilizing an effective mix of succinct text, bullet points, algorithms, and tables, Harrison’s Manual of Medicine, 18e covers every area of clinical medicine – as only Harrison’s can.

A review based on the world’s most popular medical text Market: internal medicine residents (24,000); internists (77,000 general; 75,000 specialty), third year medical students (17,000) Duplicates the organization and coverage of the new Harrison’s Principles of Internal Medicine, 18e More than 1000 questions simulate the primary certification exam in internal medicine Coverage spans the entire spectrum of internal medicine

Rheumatology–with all the authority of HARRISON’S Featuring the chapters on rheumatology that appear in Harrison’s Principles of Internal Medicine, 17e, this compact clinical companion delivers the latest knowledge in the field, backed by the scientific rigor and reliability that have defined Harrison’s. Inside you’ll find coverage that reflects the expertise of renowned editors and contributors–presented in a carry-anywhere format that makes it ideal for the classroom, the wards, or exam/certification preparation. Features: Current, thorough coverage of need-to-know immunology and rheumatology topics, including the immune system in health and disease, disorders of immune-mediated injuries, and disorders of the joints and adjacent tissues Integration of pathophysiology with clinical management topics in each of the disease-oriented topics Helpful appendix of laboratory values of clinical importance 60+ high-yield questions and answers drawn from Harrison’s Principles of Internal Medicine Self-Assessment and Board Review, 17e Content and reference updates since the publication of Harrison’s Principles of Internal Medicine, 17e 23 chapters written by physicians who have made seminal contributions to the body of knowledge in their areas of expertise The Harrison’s specialty series is written by the world-renowned author team who brought you Harrison’s Principles of Internal Medicine, 17e: Anthony S. Fauci, MD Eugene Braunwald, MD Dennis L. Kasper, MD Stephen L. Hauser, MD Dan L. Longo, MD J. Larry Johnson, MD, PhD Joseph Lascalzo, MD, PhD

Put the authority and accuracy of Harrison’s in the palm of your hand! NOW IN FULL COLOR! Referenced to Harrison’s Principles of Internal Medicine, the world’s leading internal medicine textbook, this ultra-handy, portable reference delivers on-the-spot answers to the clinical problems you face in everyday practice. Turn to any page, and you’ll find essential point-of-care guidance on all the major conditions seen in clinical medicine. Completely updated to reflect all the major advances and new clinical developments, the new edition of the Manual is the most indispensable yet. It continues to focus on diagnosis and therapy with an emphasis on patient care and offers authoritative, high-yield coverage of: Etiology and epidemiology Clinically relevant pathophysiology Signs & Symptoms Differential Diagnosis Physical and Laboratory Findings Therapeutics Practice Guidelines NEW FEATURES Full-color presentation for the first time! Full-color images of clinical conditions encountered in dermatology, cardiology, and eye diseases New chapters on end-of-life care, congenital heart disease in the adult patient, non-invasive cardiac examination, and metabolic syndrome Look for these other great Harrison’s titles: Harrison’s Principles of Internal Medicine, 17e Harrison’s Online available through Accessmedicine.com

More than 1000 questions in the style and content included on the primary certification examination in internal medicine Content reflects the weighting of subject matter included on the IM Examination Blueprint Explanations are concise but with plenty of helpful detail. The book explains why answers are incorrect, in addition why the correct ones are correct. add real value for the reader. New: Includes twice the number of color illustrations as the previous edition! Content is tied directly to the most trusted, used textbook in all of internal medicine New: Includes a brand new first chapter on test taking strategies, with coverage for FMGs included! New: Includes new questions on professionalism, ethics, health disparities, and all the clinical areas updated within Harrison’s 17th edition

Introducing the most dramatically revised edition of Harrison’s ever! Now with NEW bonus DVD with 37 chapters and more than 500 brand new images and video clips! MORE THAN TRUSTED, BEYOND ESSENTIAL . . . The #1 selling medical textbook worldwide, Harrison’s has defined internal medicine for millions of clinicians and students. The new Seventeenth Edition retains Harrison’s acclaimed balance of pathobiology, cardinal signs and manifestations of disease, and best approaches to patient management, yet has been massively updated to give you an innovative array of bold new features and content. If ever there was one must-have resource for clinicians and students – this is it! UNMATCHED EXPERTISE AT YOUR FINGERTIPS As an unprecedented amount of medical information bombards you and your patients, where do you go to sort it out and make sense of it all? When your patients request clarification on something they’ve “printed off” where do you turn for expert explanations? The same trusted resource physicians and students have turned to for over fifty years: Harrison’s Principles of Internal Medicine. Now more than ever, trust Harrison’s to filter and clarify the exploding knowledge base, to highlight the breakthroughs, and to deliver a clear, balanced distillation of the best and most current information on which to base clinical decisions. THE MOST EXCITING AND EXTENSIVELY REVISED EDITION EVER! Here are just a few of the reasons why the new 17th Edition of Harrison’s is the best edition yet: Bonus companion DVD featuring: 37 new “e-chapters”; over 500 brand-new radiological, laboratory, and clinical images, including complete atlases; state-of-the-art video clips; an Image Bank of nearly all the illustrations contained in the parent text, and much more Expanded, modernized illustration program with more than 800 brand-new, additional illustrations-a 60% increase over the previous edition Dozens of brand new chapters on vital topics in medical education and clinical practice: Global Issues in Medicine: Patient Safety and Health Quality; Health Disparities: Atlas of EKGs; Clinical Management of Obesity: Atlas of Hematology: Atlases of Chest, Neurological, and Cardiovascular Radiology, and much more! Also included a complete new Section on biological foundations and emerging clinical applications of regenerative medicine! Brand new, reader-friendly text design optimizes the full-color format An expanded, innovative focus on global health NEW Global Advisory Board comprised of 11 prominent medical experts from Asia, India, Europe, and South America Revision of the popular On Line Learning Center, which offers more skill-sharpening self-assessment questions and answers, plus additional case studies for helping you apply Harrison’s content to the daily care of patients Harrison’s related products are available in a full suite of formats to meet all your educational and clinical needs. Harrison’s Practice of Medicine is a complete database of more than 700 clinical topics formatted for use at the point of care. The Harrison’s Manual of Medicine is one of the most popular and heavily used handbook-sized resources in internal medicine. The Harrison’s Self-Assessment and Board Review features more than 1000 board-type cases and questions and highlights the use of Harrison’s as a great board prep resouce.

The authority of Harrison’s at the point of care! Covering the full scope of internal medicine, the new edition of this “mini-textbook” is thoroughly revised to reflect new content areas and quicker retrieval of clinical information. The manual continues to focus on diagnosis and therapy with an emphasis on patient care. Features a new section on Care of the Hospitalized Patient, with a new chapter on Procedures in Internal Medicine as well as a section on patient admittance orders.

SAVES $20! This value pack consists of Kasper: Harrison’s Principles of Internal Medicine, 16/e and Wiener: Harrison’s Principles of Internal Medicine Board Review, 16/e.

Harrison’s Principles of Internal Medicine, 15/e PLUS A 1-year subscription to Online. Covers diagnosis and expanded treatment for thousands of diseases. Cardinal manifestations of disease and pathophysiology are included throughout. Includes 90 new chapters, expanded treatment, genetic considerations, and much more. The complete text of Harrison’s Principles of Internal Medicine on the internet. Users get DAILY UPDATES, Free Bi-weekly newsletter, quick links to online resources, and self-assessment questions. Harrison defines the practice and science of internal medicine. Beginning with a section on current topics (e.g. ethics, cost awareness, disease prevention), the book proceeds to cardinal manifestations of disease (e.g. pain, fever, headache), which remains one the most popular parts especially among medical students. The core is a comprehensive presentation of all major diseases in the major specialties of internal medicine. (Oncology and hematology; infectious diseases; cardiology; respiratory; kidney and urinary tract; gastrointestinal system; immune system, connective tissue and joints; endocrinology and metabolism; and neurology. Thirteen brand new chapters have been add

During the last 5 years, major advances have been made in our understanding of the pathogenesis of human immunodeficiency virus (HIV) disease and in the development of new potent antiviral agents. With regard to HIV pathogenesis, several recent observations have not only changed our perspectives of HIV disease, but have been critical for the design of therapeutic strategies. These oberservations include: 1. The delineation of the virologic and immunologic events associated with primary HIV infection. 2. The development of highly sensitive molecular techniques including polymerase chain reaction (PCR) assays for the determination of HIV RNA in plasma, together with the identification of lymphoid tissue as the primary anatomic site for HIV replication and spreading. 3. The characterization of the dynamics of HIV infection. 4. The identification of chemokines with suppressor activity on HIV replication and the discovery of co-receptor molecules for HIV entry.