What type of vaccine is the S. pneumoniae vaccine?
There are two types of vaccines available for S. pneumoniae. The first vaccine is composed of 23 polysaccha-rides purified from the capsules of the most important serotypes. This vaccine is indicated for at-risk adults (>65 years old, asplenic) and the antibody levels decrease to prevaccination levels after 10 years. The second vaccine is the 7-valent conjugate vaccine that is recommended for all infants and children.