| abstract |
Glycoproteinic conjugates having trivalent immunogenic activity obtained by binding, by a covalent bond, to a protein selected among CRM 197, tetanus toxoid, and pertussis toxin, at least an oligosaccharidic hapten derived from the capsular polysaccharide of a gram-positive bacterium and at least an oligosaccharidic hapten derived from the capsular polysaccharide of a gram-negative bacterium, and wherein said oligosaccharidic haptens are previously activated by introducing terminal esters. |