title: Primordial immunity: foundations for the vertebrate immune system. Introduction.
authors.affiliation: Department of Pathology, State University of New York, Stony Brook 11794-8691.
authors.forename: G S
authors.initials: GS
authors.lastname: Habicht
mesh_terms: D000818:Animals; D005075:Biological Evolution; D007109:Immunity / Q000235:genetics; D007448:Invertebrates / Q000276:immunology; D014714:Vertebrates / Q000276:immunology