CD79A and Epstein-Barr virus infection: One of the interesting results, the HNCA-positive family history group of NPC patients revealed far lower level of EBV IgG and IgA antibodies, 0.2 ± 0.065 and 0.177 ± 0.1 respectively, than in the HNCA-negative family history group, 0.377 ± 0.041 (p < 0.05) and 0.499 ± 0.076 respectively (p < 0.01), (Table 3 and Fig. 11) rendering the HNCA-negative family history group of NPC the most affected by EBV infection and vice versa.