#antigen  any substance (as a toxin or enzyme) that stimulates the production of antibodies
  supertype:  #substance__matter  that which has mass and occupies space; "an atom is the smallest indivisible unit of matter"
  subtype:  #immunogen__immunizingagent  any substance or organism that provokes an immune response (produces immunity) when introduced into the body
     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
  subtype:  #agglutinogen  any substance that acts as an antigen to cause agglutinin production
     subtype:  #isoagglutinogen  an antigen capable of causing the production of (or reacting with) an isoagglutinin
  subtype:  #fetoprotein  any of several antigens that occur naturally in the fetus and sometimes in adults with cancer
     subtype:  #alpha_fetoprotein__alphafetoprotein__alpha_foetoprotein__alphafoetoprotein__afp  an abnormally large amount of this fetoprotein in the fetus can signal an abnormality of the neural tube (as spina bifida or anencephaly)
  subtype:  #anatoxin__toxoid  a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin; "diphtheria toxoid"
  subtype:  #rhesus_factor__Rh_factor__Rh  a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia

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