Immunodiagnostics market or immunoassay is a key technique of in vitro diagnostics that deals with the diagnosis of various diseases based on antigen-antibody reaction. Immunodiagnostics is an analytical technique, which employs antibodies as reagents against the antigens to be detected. The result of immunodiagnostics test aids in diagnosing. It also has clinical application in the field of infectious diseases, oncology & endocrinology, hepatitis & retrovirus, bone & mineral, autoimmunity, cardiac biomarker, and others. The test is usually performed in laboratories and hospitals from patient's biological specimen such as blood, urine, stool, or other body fluid to detect diseased condition and infection.