title: New challenges in the development of a conjugate pneumococcal vaccine.
authors.forename: R S
authors.initials: RS
authors.lastname: Baltimore
mesh_terms: D000293:Adolescent; D001428:Bacterial Vaccines / Q000138:chemical synthesis* / Q000737:chemistry; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011008:Pneumococcal Infections / Q000517:prevention & control; D011135:Polysaccharides, Bacterial / Q000276:immunology; D013296:Streptococcus pneumoniae / Q000145:classification / Q000276:immunology*
chemical_list: D001428:Bacterial Vaccines; D011135:Polysaccharides, Bacterial