#immunogen__immunizingagent  any substance or organism that provokes an immune response (produces immunity) when introduced into the body
  supertype:  antigen  any substance (as a toxin or enzyme) that stimulates the production of antibodies
  subtype:  vaccine  immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
     subtype:  DPT_vaccine  abbreviation for combination vaccine against diphtheria and pertussis (whooping cough) and tetanus toxoids; usually given in a series of injections in early childhood
     subtype:  pneumococcal_vaccine__Pneumovax  vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus
     subtype:  poliovirus_vaccine  vaccine prepared from poliovirus to provide immunity to poliomyelitis
        subtype:  Sabin_vaccine__oral_poliovirus_vaccine__OPV__trivalent_live_oral_poliomyelitis_vaccine__TOPV  an oral poliovirus vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis
        subtype:  Salk_vaccine__IPV  a poliovirus vaccine consisting of inactivated polio virus that is injected subcutaneously to provide immunity to poliomyelitis
  subtype:  toxin_antitoxin__toxinantitoxin  a mixture of toxin and antitoxin used to immunize against a disease

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