at 4 and 6 months of age , 118 infants were vaccinated with either one of two haemophilus influenzae type b capsular polysaccharide-protein conjugate vaccines : 72 infants received the polysaccharide coupled to diphtheria toxoid ( prp-d group ) , and 46 infants received polysaccharide-derived oligosaccharides coupled to crm197 protein , a nontoxic mutant form of diphtheria toxin ( hboc group ) .
C0032594
polysaccharide
C0028959
oligosaccharides