Berson and yellow 1st described the following test
Berson and Yalow discovered RIA in 1959 by which we can quantify antigens or hormones upto picograms-v sensitive than ELISA RIA /ELISA-indirect immunofluorescence tests Ref: Textbook of Microbiology Baveja 5th ed Pg 115
RIA
ELISA
Immuno chromatography
Chemiluminescence assay
Immunology