Using a cross-sectional study, Stefan Flasche and colleagues investigated the effects of the UK pneumococcal vaccination program on serotype-specific carriage and invasive pneumococcal disease. There are more than 90 Streptococcus pneumoniae serotypes that can cause invasive pneumococcal disease (IPD). The pneumococcal conjugate vaccine PCV7 contains antigens from seven serotypes responsible for IPD. Immunization with PCV7 […]