title: Studies mixed on efficacy of Haemophilus influenzae B vaccine.
mesh_terms: D016667:Bacterial Capsules; D001428:Bacterial Vaccines; D002648:Child; D002675:Child, Preschool; D004341:Drug Evaluation; D006192:Haemophilus Infections / Q000517:prevention & control*; D018073:Haemophilus Vaccines; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D011135:Polysaccharides, Bacterial
chemical_list: D001428:Bacterial Vaccines; D018073:Haemophilus Vaccines; C044237:Haemophilus influenzae type b polysaccharide vaccine; D011135:Polysaccharides, Bacterial