Detection of antibody activity.
D000906:Antibodies / Q000032:analysis*; D006386:Hemagglutination Tests; D006801:Humans; D005779:Immunodiffusion; D007074:Immunoglobulin G / Q000032:analysis; D008722:Methods; D011233:Precipitin Tests; D005719:gamma-Globulins / Q000032:analysis*
D000906:Antibodies; D007074:Immunoglobulin G; D005719:gamma-Globulins