NCIt related terms : Pneumococcal 23-valent Polysaccharide Vaccine; PCV 23;
NCIt definition : An polyvalent vaccine used to prevent infection by the bacterium Streptococcus pneumoniae.
Pneumococcal polyvalent vaccine contains highly purified capsular antigens from the
23 most prevalent or invasive pneumococcal types of Streptococcus pneumoniae to ensure
cross-protection. Following vaccination, protective capsular type-specific antibody
levels typically develop by the third week; serotype-specific antibody levels generally
decline after 5-10 years.;