antibody responses were detected by hi and srh tests : immunogenicity of the preparation was different for the individual vaccine strain in spite of the similar amount of antigenic content , and the immunity conferred by vaccine strains did not significantly extend to new influenza virus strains which prevailed in 1979/80 winter season with the exception for a/brazil/11/78 ( h1n1 ) .
C0003320
antigenic
C0020964
immunity