ANTIGENE POLYSACCHARIDFRAGMENTE MIT EINER TERMINALEN 2,5-ANHYDRO-D-MANNOSEGRUPPEVON GRUPPE B-STREPTOCOCCUS, TYP II UND TYP III, UND DARAUS HERGESTELLTE KONJUGATIMPFSTOFFE

The process for depolymerizing Group B Types II and III Streptococcal Polysaccharide is disclosed which results in polysaccharide fragments having a reducing end suitable for conjugating to protein. Conjugate molecules, vaccines and their use to immunize mammals including humans are also disclosed.