title: Boundaries of immune reactivity: implications for the relationship of man to his environment.
mesh_terms: D000918:Antibody Specificity; D000939:Epitopes / Q000276:immunology; D006801:Humans; D007121:Immunocompetence; D007136:Immunoglobulins / Q000502:physiology*; D007239:Infections / Q000276:immunology*
chemical_list: D000939:Epitopes; D007136:Immunoglobulins