title: Understanding vaccines. How immunizations help fight disease.
mesh_terms: D000328:Adult; D002648:Child; D006801:Humans; D007113:Immunity, Innate / Q000276:immunology; D014121:Toxoids / Q000276:immunology; D014611:Vaccination / Q000379:methods*; D014612:Vaccines / Q000276:immunology*; D014613:Vaccines, Attenuated / Q000276:immunology; D015164:Vaccines, Inactivated / Q000276:immunology
chemical_list: D014121:Toxoids; D014612:Vaccines; D014613:Vaccines, Attenuated; D015164:Vaccines, Inactivated