title: The IgA antibody system.
mesh_terms: D000293:Adolescent; D000361:Agammaglobulinemia / Q000276:immunology; D000818:Animals; D000917:Antibody Formation; D001260:Ataxia Telangiectasia / Q000276:immunology; D005075:Biological Evolution; D001692:Biological Transport; D002648:Child; D002675:Child, Preschool; D003126:Colostrum / Q000276:immunology; D006801:Humans; D007110:Immunity, Active; D007112:Immunity, Maternally-Acquired; D005779:Immunodiffusion; D007070:Immunoglobulin A / Q000096:biosynthesis / Q000378:metabolism; D007136:Immunoglobulins / Q000096:biosynthesis*; D007153:Immunologic Deficiency Syndromes; D009092:Mucous Membrane / Q000276:immunology; D011054:Poliovirus Vaccine, Inactivated; D012463:Saliva / Q000276:immunology
chemical_list: D007070:Immunoglobulin A; D007136:Immunoglobulins; D011054:Poliovirus Vaccine, Inactivated