CD79A and nasopharyngeal carcinoma: Table 5 shows that compared to never smokers, current smokers had an increased NPC risk mediated through anti‐EBV VCA IgA (indirect risk ratio (RR) = 1.56, 95% CI = 1.12‐2.23 and direct RR = 1.02, 95% CI = 0.70‐1.50).