Immunodiagnostics is a methodology that uses an antigen-antibody reaction as its primary means to detect the diseased state of a patient. The assay looks at the activity of different markers expressed through blood, serum, plasma, and other biological components for the diagnosis. Common examples of this method include lateral-flow tests and ELISA.
Immunoassays are the assays used in immunodiagnostics to study a biological system. Immunoassays provides us with insights for understanding and diagnosing diseases from infectious diseases and cancers to metabolic disorders and cardiac health.
An immunoassay measures the concentration of the target molecule, or analyte, through antigen-antibody reactions, utilizing an antibody specific to the analyte.
Immunotherapy is the treatment of disease by activing or supressing the immune system.