Firstly, there are two types of pneumonia vaccine, namely the pneumococcal polysaccharide vaccine (PPV) and pneumococcal conjugate vaccine (PCV). These Pneumonia vaccines work by helping the body to create antibodies to multiple infectious strains of the bacteria Streptococcus pneumonia. These antibodies act as identification marker to recognise potentially harmful bacteria so that they can be eradicated before they cause any infections. The antibodies should, therefore, help protect you against potential infections caused by these bacterias.