Letter: Pneumococcal vaccines.
D000328:Adult; D000942:Antigens, Bacterial; D001428:Bacterial Vaccines; D002648:Child; D006801:Humans; D011008:Pneumococcal Infections / Q000517:prevention & control*; D013296:Streptococcus pneumoniae / Q000276:immunology
D000942:Antigens, Bacterial; D001428:Bacterial Vaccines