Mangtani, P; Cutts, F; Hall, AJ; (2003) Efficacy of polysaccharide pneumococcal vaccine in adults in more developed countries: the state of the evidence. The Lancet infectious diseases, 3 (2). pp. 71-8. ISSN 1473-3099 DOI: https://doi.org/10.1016/S1473-3099(03)00514-0 Full text not available from this repository.