in the sera of 17 patients with nasopharyngeal carcinoma ( npc ) and of 19 patients with tonsillar carcinoma ( tc ) the titres of iga , igg and igm antibodies to ebv vca ( viral capsid antigen ) and of igg antibodies to ebv ea ( early antigen ) were determined by the indirect immunofluorescence ( if ) method .
C0003342
viral
C0003320
antigen