Immunoassays/ Immunochemistry: Immunoassays are bioanalytical methods which are based on the detection of an analyte by using the binding of an antibody to an antigen. Depending on the assay format, the wanted analyte can be an antigen or an antibody from the patient sample. The importance and widespread of immunoassay methods are attributed to their specificity and high sensitivity for the analysis of wide ranges of analytes in biological samples. Immunoassay methods are e.g. ELISA, EIA, RIA, Western Blot, Lateral Flow Assays, immunohistochemistry, Protein Arrays or Immuno-PCR.