Purified pneumococcal polysaccharide type 1 is manufactured by Pfizer, Inc., for small-quantity distribution by ATCC. The pneumococcal powder type 1 is a component of the current 13-valent vaccine against Streptococcus pneumoniae. Pneumococcal polysaccharide type 1 can be used to assay for type-specific antibodies, research immune responses, and study immunodeficiencies.