title: Dose-specific efficacy of Haemophilus influenzae type b conjugate vaccines: a systematic review and meta-analysis of controlled clinical trials.
abstract: Global coverage of infant Haemophilus influenzae type b (Hib) vaccination has increased considerably during the past decade, partly due to GAVI Alliance donations of the vaccine to low-income countries. In settings where large numbers of children receive only one or two vaccine doses rather than the recommended three doses, dose-specific efficacy estimates are needed to predict impact. The objective of this meta-analysis is to determine Hib vaccine efficacy against different clinical outcomes after receiving one, two or three doses of vaccine. Studies were eligible for inclusion if a prospective, controlled design had been used to evaluate commercially available Hib conjugate vaccines. Eight studies were included. Pooled vaccine efficacies against invasive Hib disease after one, two or three doses of vaccine were 59%, 92% and 93%, respectively. The meta-analysis provides robust estimates for use in decision-analytical models designed to predict the impact of Hib vaccine.
authors.affiliation: Department of Global Health and Development, London School of Hygiene and Tropical Medicine, UK. ulla.griffiths@lshtm.ac.uk
authors.forename: U K
authors.initials: UK
authors.lastname: Griffiths
authors.forename: A
authors.initials: A
authors.lastname: Clark
authors.forename: B
authors.initials: B
authors.lastname: Gessner
authors.forename: A
authors.initials: A
authors.lastname: Miners
authors.forename: C
authors.initials: C
authors.lastname: Sanderson
authors.forename: E R
authors.initials: ER
authors.lastname: Sedyaningsih
authors.forename: K E
authors.initials: KE
authors.lastname: Mulholland
mesh_terms: D004306:Dose-Response Relationship, Immunologic; D018073:Haemophilus Vaccines / Q000008:administration & dosage* / Q000276:immunology*; D006801:Humans; D007115:Immunization Schedule; D018074:Vaccines, Conjugate / Q000008:administration & dosage / Q000276:immunology
chemical_list: D018073:Haemophilus Vaccines; D018074:Vaccines, Conjugate