公开(公告)号：US20190070283A1

公开(公告)日：2019-03-07

申请号：US16166708

申请日：2018-10-22

Applicant: Pfizer Inc.

Inventor： Mingming Han ,  Avvari Krishna Prasad ,  David Cooper ,  Wendy Jo Watson

IPC: A61K39/09 ,  A61K39/39 ,  A61K39/385 ,  A61K39/00

Abstract: The invention relates to isolated Streptococcus pneumoniae serotype 15B capsular polysaccharide and processes for their preparation. The invention also relates to immunogenic conjugates comprising Streptococcus pneumoniae serotype 15B capsular polysaccharide covalently linked to a carrier protein, processes for their preparation and immunogenic compositions comprising them.