The joining of polysaccharide antigens to various proteins can result in in
creased immunogenicity of vaccines composed of such antigens. This article
discusses conjugated polysaccharide vaccines for Haemophilus influenzae, St
reptococcus pneumoniae, and Neisseria meningitis. increased availability an
d use of such vaccines may result in the ability to give more effective vac
cines earlier in life, further reducing the incidence of diseases caused by
these organisms.