for influenza a ( h1n1 ) virus , sensitivity of detecting antigen was about 8- to 32-fold less when an fitc-conjugated monoclonal igg antibody pool specific for epitopes in three different antigenic sites on influenza hemagglutinin was used as the second antibody as compared to when igg from hyperimmune sera specific for virus or its components was used as the second antibody .
C0003316
epitopes
C0003320
antigenic