However, high baseline mucosal IgA against various influenza antigens, including influenza B/Victoria/2/87-like lineage HA and NA (61), pH1N1 HA (48), N1 (20), H3N2 NA (18), and cH7/3 IgA (44) was also pivotal, underscoring the complementary roles of systemic and mucosal immunity. This evidence concerns the gene CD79A and influenza.