sera from patients with primary or recurrent nasopharyngeal carcinoma and from patients in remission , from patients with various other head and neck tumors ( including occult primary lesions and lymphomas ) , and from normal controls were titrated for igg antibodies to viral capsid antigen ( vca ) and early antigen and iga antibodies to vca , using indirect immunofluorescence procedures previously detailed .
C0003342
viral
C0003320
antigen