Case-control studies of the effectiveness of vaccines: validity and assessment of potential bias.
D000907:Antibodies, Bacterial / Q000032:analysis; D016667:Bacterial Capsules; D015982:Bias; D016022:Case-Control Studies; D002675:Child, Preschool; D016001:Confidence Intervals; D005260:Female; D006192:Haemophilus Infections / Q000453:epidemiology / Q000517:prevention & control*; D018073:Haemophilus Vaccines / Q000008:administration & dosage*; D019741:Haemophilus influenzae type b / Q000276:immunology; D006801:Humans; D007109:Immunity / Q000502:physiology*; D007115:Immunization Schedule; D007223:Infant; D008297:Male; D011135:Polysaccharides, Bacterial / Q000008:administration & dosage*; D011336:Probability; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D014611:Vaccination / Q000379:methods*
D000907:Antibodies, Bacterial; D018073:Haemophilus Vaccines; C044237:Haemophilus influenzae type b polysaccharide vaccine; D011135:Polysaccharides, Bacterial