title: Immunogenicity of a Meningococcal B Vaccine during a University Outbreak.
abstract: In December 2013, a multicomponent meningococcal serogroup B (4CMenB) vaccine was used before licensure on the basis of special consideration by the Food and Drug Administration to respond to an outbreak of Neisseria meningitidis B at a U.S. university. Data suggested that vaccination would control the outbreak because isolates expressed antigens that were closely related to the vaccine antigens (factor H-binding protein [fHbp] and neisserial heparin-binding antigen). We quantified the immune responses induced by 4CMenB during the outbreak.
  
  
  
  We conducted a seroprevalence survey among students to assess vaccination status and collect serum specimens to quantify titers of serum bactericidal antibodies (SBA) with an assay that included human complement (hSBA). We compared the proportion of vaccinated and unvaccinated participants who were seropositive for the outbreak strain and for one closely related reference strain (44/76-SL, which included fHbp) and one mismatched reference strain (5/99, which included neisserial adhesin A), both of which were used in vaccine development. Seropositivity was defined as an hSBA titer of 4 or higher.
  
  
  
  Among the 499 participants who received two doses of the 4CMenB vaccine 10 weeks apart, 66.1% (95% confidence interval [CI], 61.8 to 70.3) were seropositive for the outbreak strain, although the geometric mean titer was low at 7.6 (95% CI, 6.7 to 8.5). Among a random subgroup of 61 vaccinees who also received two doses but did not have a detectable protective response to the outbreak strain, 86.9% (95% CI, 75.8 to 94.2) were seropositive for the 44/76-SL strain, for which there was a geometric mean titer of 17.4 (95% CI, 13.0 to 23.2), whereas 100% of these vaccinees (95% CI, 94.1 to 100) were seropositive for the 5/99 strain and had a higher geometric mean titer (256.3; 95% CI, 187.3 to 350.7). The response to the outbreak strain was moderately correlated with the response to the 44/76-SL strain (Pearson's correlation,0.64; P<0.001) but not with the response to the 5/99 strain (Pearson's correlation,-0.06; P=0.43).
  
  
  
  Eight weeks after the second dose of the 4CMenB vaccine was administered, there was no evidence of an hSBA response against the outbreak strain in 33.9% of vaccinees, although no cases of meningococcal disease caused by N. meningitidis B were reported among vaccinated students. (Funded by Princeton University and others.).
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Nicole E
authors.initials: NE
authors.lastname: Basta
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Adel A F
authors.initials: AA
authors.lastname: Mahmoud
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Julian
authors.initials: J
authors.lastname: Wolfson
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Alexander
authors.initials: A
authors.lastname: Ploss
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Brigitte L
authors.initials: BL
authors.lastname: Heller
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Sarah
authors.initials: S
authors.lastname: Hanna
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Peter
authors.initials: P
authors.lastname: Johnsen
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Robin
authors.initials: R
authors.lastname: Izzo
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Bryan T
authors.initials: BT
authors.lastname: Grenfell
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Jamie
authors.initials: J
authors.lastname: Findlow
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Xilian
authors.initials: X
authors.lastname: Bai
authors.affiliation: From the School of Public Health, University of Minnesota, Minneapolis (N.E.B., J.W.); Princeton University, Princeton, NJ (N.E.B., A.A.F.M., A.P., B.L.H., S.H., P.J., R.I., B.T.G.); National Institutes of Health Research and Policy for Infectious Disease Dynamics, Bethesda, MD (N.E.B., B.T.G.); and the Vaccine Evaluation Unit, Public Health England, Manchester Royal Infirmary, Manchester, United Kingdom (J.F., X.B., R.B.).
authors.forename: Ray
authors.initials: R
authors.lastname: Borrow
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D004196:Disease Outbreaks / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D008585:Meningitis, Meningococcal / Q000453:epidemiology / Q000276:immunology* / Q000517:prevention & control; D022401:Meningococcal Vaccines / Q000276:immunology*; D038541:Neisseria meningitidis, Serogroup B / Q000276:immunology*; D009515:New Jersey / Q000453:epidemiology; D016036:Seroepidemiologic Studies; D014481:United States / Q000453:epidemiology; D014495:Universities; D055815:Young Adult
chemical_list: C570015:4CMenB vaccine; D000907:Antibodies, Bacterial; D022401:Meningococcal Vaccines