title: Prevalence of bactericidal antibodies to Haemophilus influenzae, type b.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000907:Antibodies, Bacterial / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D003165:Complement System Proteins; D005260:Female; D006193:Haemophilus influenzae / Q000276:immunology*; D006801:Humans; D007223:Infant; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011247:Pregnancy; D012959:Socioeconomic Factors
chemical_list: D000907:Antibodies, Bacterial; D003165:Complement System Proteins