CD79A and nasopharyngeal carcinoma: Indirect support for this hypothesis includes the observation in a few studies that cigarette smoking is associated with increased levels of anti‐EBV IgA antibodies in those associated with increased NPC risk (VCA and EBNA1, for example)17 and that elevated anti‐EBV IgA antibodies are indicative of mucosal exposure to EBV during lytic viral reactivation of the virus in the pharyngeal space.21, 22, 23, 24