CD79A and allergic rhinitis: In patients with allergic rhinitis (AR), nasal allergen challenge induces local IgA production (153), and specific nasal IgA responses have been reported for different allergens, including house dust mites (174), grass (175), ragweed (176, 177), birch pollen (178, 179), and red cedar (180) with antigen-specific IgA levels correlating with nasal symptoms (180).