title: Clinical trial of the protective role of polyvalent pneumococcal vaccine in sickle cell anaemia patients in Zambia.
mesh_terms: D000293:Adolescent; D000755:Anemia, Sickle Cell / Q000150:complications* / Q000276:immunology; D001428:Bacterial Vaccines / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D011008:Pneumococcal Infections / Q000276:immunology / Q000517:prevention & control*; D022242:Pneumococcal Vaccines; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D001428:Bacterial Vaccines; D022242:Pneumococcal Vaccines