The fourth edition of The Immunoassay Handbook is a thoroughly updated guide to the science, technology, and applications of ELISA and other immunoassays. It describes a wide range of methods and gives insight into the latest developments and applications in clinical and veterinary practice and pharmaceutical and life science research. Revised and extensively updated, with more than 30% new material and 77 chapters, it reveals underlying common principles and simplifies an abundance of innovation. The Immunoassay Handbook reviews a range of topics, now including lateral flow, microsphere multiplex assays, immunohistochemistry, practical ELISA development, assay interferences, pharmaceutical applications, qualitative immunoassays, antibody detection and lab-on-a-chip. This handbook is a must-read for clinicians, clinical and veterinary chemists, biochemists, food technologists, environmental scientists, and students and researchers in medicine, immunology and proteomics. David Wild is a healthcare industry veteran, with experience in biotechnology, pharmaceuticals, medical devices and immunodiagnostics. He worked for Amersham, Eastman-Kodak, Johnson & Johnson, and Bristol-Myers Squibb and consulted for diagnostics and biotechnology companies. He led research and development programs, design and construction of chemical and biotechnology plants, and integration of acquired companies. Director-level positions included R&D, design engineering, operations, and strategy. He retired in 2012 to focus on his role as editor of The Immunoassay Handbook.