Holt's diphtheria toxoid; an investigation as to reproducibility of antigenic properties in successive batches.
D004165:Diphtheria; D004167:Diphtheria Toxin; D004168:Diphtheria Toxoid; D006801:Humans; D015203:Reproducibility of Results; D014121:Toxoids
DIPHTHERIA/toxin and toxoid