On the antigenicity of diphtheria toxoid.  III.  The immunizing potency of diphtheria toxoid fractions isolated at lower ammonium sulfate concentration.
D000645:Ammonium Sulfate; D004165:Diphtheria; D004168:Diphtheria Toxoid; D007114:Immunization; D014611:Vaccination
D004168:Diphtheria Toxoid; D000645:Ammonium Sulfate
DIPHTHERIA