CD79A and influenza: [40] Studies on CTB-adjuvanted mucosal influenza vaccine have shown that nasal IgA responses elicited by intranasal influenza vaccine containing 1 μg HA were boosted upon CTB adjuvantation up to 4- and 6-fold, with a 2- and 3-dose regimen respectively.[41]–[42] In addition, CTB enhanced systemic IgG responses elicited by the intranasal influenza vaccine for more than 4- and 250-fold, for the two regimens respectively.