elisa showed the simultaneous , but not parallel , appearance of different immunoglobulin classes , immunoglobulin m ( igm ) reaching individual maximal values 1.8 months after vaccination on average , at the same time as agglutinating antibodies , 1 week earlier than iga , and about 1 month earlier than igg .
C0021017
immunoglobulin classes
C0020861
immunoglobulin m