In this book, the recent developments in immunology and the impact on the treatment of infections in critical care and in surgery are presented, also describing how cellular immunology influences clinical treatment. This information helps in understanding the pathogenesis of infections in surgery and critical care. The impact of a standard treatment such as antibiotic therapy is evaluated and possible future therapy modalities outlined. This book will be of interest to clinicians and immunologists as scientists of both specialties have contributed to the book.