Safety and Immunogenicity in Dose-Ranging and Formulation-Finding Meningococcal B (MenB) Vaccine...
Meningococcal MeningitisMeningococcal InfectionsThis study is aimed at assessing the safety and immunogenicity of different doses and formulations of a new Novartis Meningococcal B Recombinant Vaccine.
The Long-term Antibody Persistence of GSK Biologicals' Meningococcal Vaccine GSK134612 in Healthy...
InfectionsMeningococcalIn this study, the concentration of antibody to the vaccine one year, three and five years after vaccination in subjects who were vaccinated with GSK Biologicals' meningococcal vaccine GSK134612 and Menactra® in a previous study (whose objectives & outcome measures are presented in a separate protocol posting with NCT number =00454909) will be evaluated. The safety and immune response to a booster dose of vaccine GSK134612 administered at 5 years post-primary vaccination and a primary vaccination of a newly enrolled group with GSK 134612 vaccine will also be evaluated.
Extension Study of V72P13 to Evaluate the Safety, Tolerability and Immunogenicity of Novartis Meningococcal...
Meningococcal DiseaseThe proposed study is an Extension Study of V72P13 to Evaluate the Safety, Tolerability and Immunogenicity of Novartis Meningococcal B Recombinant Vaccine When Administered as a Booster at 12 Months of Age or as a Two-dose Catch-up to Healthy Toddlers
Primary Study to Demonstrate Non-inferiority and Immunogenicity of GSK Biologicals' Meningococcal...
InfectionsMeningococcalThis study will demonstrate the non-inferiority of GSK Biologicals' meningococcal vaccine 134612 when given in an experimental co-administration versus vaccine 134612 alone and versus the experimental co-administration alone in healthy subjects aged 11 through 17 years. There will be 3 groups in this study.
Study of the Safety and Immune Response of a Meningococcal Vaccine Administered to Healthy Infants...
Prevention of Meningococcal DiseaseThe purpose of this study is to evaluate the safety, immunogenicity and induction of immune memory after two or three doses of Novartis (Formerly Chiron) Meningococcal ACWY Conjugate Vaccine administered to healthy infants.
Persistence of Antibody Response to N. Meningitidis Group C in Children
Prevention of Meningococcal InfectionPersistence of Antibody Response to N. meningitidis Group C in Children
Evaluate 4 Different Formulations of Meningococcal Serogroups A,C,W-135,Y Conjugate Vaccine When...
InfectionsMeningococcalThe purpose of this study is to evaluate the immunogenicity, safety and reactogenicity of one dose of four different formulations of the MenACWY conjugate vaccine when given to healthy subjects aged 15-19 years. The selection of the best formulation will be based on data obtained up to one month after the vaccine dose.
Trial to Assess Immunogenicity and Safety of GlaxoSmithKline (GSK) Biologicals' Meningococcal ABCWY...
InfectionsMeningococcalThe main purposes for conducting the study are firstly to assess immunological non-inferiority of the MenABCWY vaccine, administered according to 0, 2 month schedule to healthy adolescents 10 to 18 years of age, to those of the licensed rMenB+OMV vaccine (Bexsero™) in terms of hSBA GMTs at one month after the second vaccination, secondly to give the flexibility for the national vaccination program by showing the safety and immunogenicity of MenABCWY administrated according to four different vaccination schedules and additionally to evaluate a potential benefit of the 3-dose vaccination series.
Investigating Meningococcal Vaccines in Adults
Meningococcal VaccinesMeningococcal Infections3 moreThis study will be an open label, exploratory immunogenicity study conducted by the Oxford Vaccine Group, University of Oxford. This study will investigate the breadth of protective activity of serum anti-FHbp antibody responses of adults immunized with 4CMenB (Bexsero®) vaccine as well as investigating the nature of the B-cell and T-cell responses induced by vaccination. The investigators aim to enroll 15 to 20 healthy adults aged 18 to 60, who will be immunized with two doses of 4CMenB (Bexsero®) two months apart according to the licensed schedule. Blood samples will be obtained at baseline and after each dose of vaccine.
Understanding the Immune Response to Two Different Meningitis Vaccines
MeningitisMeningococcal Disease1 moreThe bacterium (germ) Neisseria meningitidis causes meningitis and blood poisoning. N meningitidis is classified into different serogroups (types), based on its outer polysaccharide (carbohydrate) capsule. Serogroups A,B,C,W & Y are responsible for the vast majority of meningococcal disease worldwide. Older vaccines against types A,C,W & Y contain part of the polysaccharide capsule of the germ. However, these polysaccharide vaccines do not provide long-term protection against disease and are less effective in young children, the group most at risk of meningococcal disease. Newer "conjugate" ACWY vaccines attach a polysaccharide to a protein carrier - these provoke a good response in young children and can provide long-term protection. White blood cells called B cells produce antibodies, which are the main components of protection against meningococcal disease. Although many studies have investigated the immune response to these vaccines in different age groups by measuring specific antibodies, there is limited information about the B cells underlying such an immune response. Several different subsets (populations) of B cells exist in the blood. Previous studies by the investigators group suggest that different numbers of B cells are produced in response to each vaccine type. However, little is understood about which subset of B cell is important for antibody production in response to these polysaccharide or conjugate vaccines. This study aims to provide detailed information on the immune response to meningococcal vaccines by investigating the appearance of B cells and their subsets in the blood after vaccination with the polysaccharide and conjugate vaccines. These observations will help us understand how polysaccharide and conjugate vaccines stimulate the immune system in different ways. This knowledge will help in the development of new vaccines that are effective across all age groups. The investigators aim to recruit 20 adults aged 30-70 from Oxfordshire. The study will be funded by the Oxford Vaccine Group.