| − | Polysaccharide vaccines are composed of long chains of sugar molecules that resemble the surface of certain types of bacteria. Polysaccharide vaccines are available for [[pneumococcal]] disease, [[meningococcal]] disease and [[Haemophilus Influenzae type b]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#p</ref> | + | '''Polysaccharide vaccines''' are composed of long chains of sugar molecules that resemble the surface of certain types of bacteria. Polysaccharide vaccines are available for [[pneumococcal]] disease, [[meningococcal]] disease and [[Haemophilus Influenzae type b]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#p</ref> |