Capsule polysaccharides Streptococcus pneumoniae and their conjugates

摘要

The invention relates to isolatedStreptococcus pneumoniaeserotype 15B capsular polysaccharide and processes for their preparation. The invention also relates to immunogenic conjugates comprisingStreptococcus pneumoniaeserotype 15B capsular polysaccharide covalently linked to a carrier protein, processes for their preparation and immunogenic compositions comprising them.