“…, radioimmunoassay (RIA), 71–73 enzyme immunoassays (EIA) or enzyme-linked immunosorbent assay (ELISA), 51,71–73 fluorescent immunoassays (FIA), 72,73 chemiluminescence immunoassays (CLIA), 72,73 immunochromatographic assays (ICA), 73 and immunohistochemistry (IHC). 72,73 Besides, surface plasma resonance (SPR) and quartz crystal microbalance (QCM) are among typical label-free strategies used to detect antigen–antibody interactions, but without complex modification or labeling of components on an assay. 72,73 Recent developments in biomedicine have simplified many complex steps of an immunoassay to formulate a simple, rapid testing kit for a layman.…”