ebv-specificity of the polypeptide was demonstrated by the presence of antibodies against this polypeptide in antisera from a population of ebv-seropositive donors , but not from seronegative donors , by the presence of the polypeptide itself in ebv-carrying but not in ebv-negative cell lines and by the appearance of antibodies against this polypeptide during the course of infectious mononucleosis ( im ) .
C0020960
antisera
C0003241
antibodies