CD79A and influenza: These encouraging data from sera suggest that equivalent or improved results could be expected in mucosal immune response, considering the crucial function of IgA in mucosal immunity and its ability to neutralize influenza particles in the upper respiratory tract by preventing viral attachment to mucosal surfaces, as well as the requirement for antigen‐specific neutralizing antibodies in the lower respiratory tract to offer full protection against pathogens not inhibited in the upper respiratory tract.