[1] Pneumococcal vaccination in splenectomised cancer patients

[2] Pneumococcal vaccines WHO position paper - 2012 - recommendations

[3] Decline in invasive pneumococcal disease after the introduction of protein-polysaccharide conjugate vaccine

[4] Polysaccharide conjugate vaccine against pneumococcal pneumonia in adults

[5] 23-Valent pneumococcal polysaccharide vaccine in HIV-infected Ugandan adults: 6-year follow-up of a clinical trial cohort