CD79A and nasopharyngeal carcinoma: Anti‐EBV VCA IgA and anti‐EBV EA‐EBNA1 IgA seropositivity was not associated with sociodemographic (age, study region, education, ethnicity) or other (family history of NPC, salted fish consumption) variables evaluated, with one exception (Table S3); men under 40 years old were more likely to be seropositive (18.7%) than men in their 40s, 50s, or 60s (7.1%‐9.2%, P < .0001).