title: [Natural immunity: objective and measurable].
authors.forename: Willem
authors.initials: W
authors.lastname: van Eden
mesh_terms: D000818:Animals; D000917:Antibody Formation / Q000276:immunology / Q000502:physiology; D006801:Humans; D006920:Hygiene; D007154:Immune System Diseases / Q000453:epidemiology / Q000662:veterinary*; D007113:Immunity, Innate / Q000276:immunology* / Q000502:physiology*; D014611:Vaccination / Q000662:veterinary*