Active clinical trials for "Meningococcal Infections"

Hypothesis: Lower doses of each A/C/Y/W135 component of the meningococcal polysaccharide vaccine could confer a similar functional immunogenic response as the dose of 50 μg currently being used, and subsequently be equally protective. The purpose of this study is to evaluate the use of fractional dose tetravalent meningococcal polysaccharide vaccine to control outbreak especially caused by N. meningitidis serogroup W135 Primary Objectives: To measure the immunogenicity of a dose corresponding to one fifth of the amount of the licensed meningococcal A/C/Y/W135 polysaccharide vaccine, i.e. 10 μg for each component; and To measure the immunogenicity of a dose corresponding to one tenth of the licensed meningococcal A/C/Y/W135 polysaccharide vaccine, i.e. 5 μg for each component.

Primary Objective: To demonstrate sufficiency of the vaccine seroresponse to meningococcal serogroups A, C, W, and Y following administration of a single dose of Meningococcal Polysaccharide (Serogroups A, C, Y, and W 135) Tetanus Toxoid (MenACYW) Conjugate vaccine to Group 1 participants (who received primary vaccination with Menomune vaccine greater than or equal to [>= 3] years earlier at >= 56 years of age in Study MET49). Secondary Objectives: Secondary Objective 1 - To demonstrate sufficiency of the vaccine seroresponse to meningococcal serogroups A, C, W, and Y following administration of a single dose of MenACYW Conjugate vaccine to Group 2 participants (who received primary vaccination with MenACYW Conjugate vaccine >= 3 years earlier at >= 56 years of age in Study MET49). Secondary Objective 2 - To describe vaccine seroresponse rates with respect to serogroups A, C, W, and Y in serum specimens collected 6 days (window, 5-7) post-vaccination in approximately 60 participants from Group 1 (Menomune-primed) and approximately 60 participants from Group 2 (MenACYW Conjugate vaccine-primed). Secondary Objective 3 - To describe antibody persistence >= 3 years after primary vaccination with Menomune vaccine or MenACYW Conjugate vaccine for participants from all groups.

The primary objective of this study was to describe the safety profile of Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid (MenACYW) Conjugate Vaccine and Meningococcal (Groups A, C, Y and W 135) Oligosaccharide Diphtheria CRM197 (MENVEO®) Conjugate Vaccine when administered concomitantly with routine pediatric vaccines in healthy infants and toddlers.

The purpose/aim of this study is to assess the safety and antibody response to vaccination with a booster dose of Menveo given 4-6 years after primary MenACWY vaccination and to assess the safety and antibody response to a single dose of Menveo given to vaccine-naïve subjects

This study is looking at a new vaccine that might prevent meningococcal disease, and will study the immune response elicited by this vaccine when given to healthy young children. The study will also look at the safety of the new vaccine as well as how it is tolerated.

The purpose of the study was to evaluate immune lot consistency of Meningococcal Polysaccharide (Serogroups A, C, Y and W) Tetanus Toxoid (MenACYW) Conjugate vaccine and the immune non-inferiority compared to the licensed vaccine Menactra®, and describe the safety and additional immunogenicity of these study vaccines in adolescents and adults 10 to 55 years of age in the United States (US). Primary Objectives: To demonstrate the immune lot consistency of the antibody responses to meningococcal serogroups A, C, Y, and W following the administration of a single dose of MenACYW Conjugate vaccine with respect to serum bactericidal assay using human complement (hSBA) geometric mean titers (GMTs). To demonstrate the non-inferiority of the antibody responses to meningococcal serogroups A, C, Y, and W following the administration of a single dose of MenACYW Conjugate vaccine (pooled Lots 1 to 3) compared to those observed following the administration of a single dose of Menactra®. Secondary Objective: To demonstrate the non-inferiority of the antibody responses to meningococcal serogroups A, C, Y, and W following the administration of a single dose of MenACYW Conjugate vaccine (pooled Lots 1 to 3) compared to those observed following the administration of a single dose of Menactra® in the adult population (18 to 55 years old). To demonstrate the non-inferiority of the antibody responses to meningococcal serogroups A, C, Y, and W following the administration of a single dose of MenACYW Conjugate vaccine (pooled Lots 1 to 3) compared to those observed following the administration of a single dose of Menactra® in the adolescent population (10 to 17 years old). To compare the hSBA vaccine seroresponses of meningococcal serogroups A, C, Y, and W for each of 3 lots of MenACYW Conjugate vaccine 30 days (+14 days) after vaccination. To compare the hSBA antibody GMTs of meningococcal serogroups A, C, Y, and W following the administration of MenACYW Conjugate vaccine to those observed following the administration of Menactra®. Observational Objectives: To describe the safety profile of MenACYW Conjugate vaccine and that of the licensed Menactra®.

This study will evaluate safety, tolerability, and immunogenicity of a booster dose of a meningococcal vaccine formulation in adolescents.

The proposed study is aimed at assessing the safety and immunogenicity of rMenB+OMV NZ when administered alone without routine infant vaccines to healthy infants in their first year of life according to different two and three dose immunization schedules, which are suitable to be adopted by various national programs. This study will also investigate antibody persistence post primary series and administration of a subsequent booster dose of rMenB+OMV NZ at 11 months of age. In addition, this study will assess the safety and immunogenicity of two catch-up doses of rMenB+OMV NZ when administered to healthy children 2 to 10 years of age. This study will also evaluate the safety and immunogenicity of the concomitant administration of rMenB+OMV NZ with meningococcal C conjugate vaccine (MenC-CRM) according to a 3, 5 and 12-month schedule.

This study evaluates the immunogenicity and safety of the meningococcal conjugate vaccine GSK 134612 in healthy infants, when co-administered with other infant vaccines, on three different dose schedules.

This aim of the study is to assess post-marketing safety of a single dose of Menactra® vaccine with the intent to support conversion from monitored release to initial registration of Menactra® vaccine in the Philippines. Primary Objective: To describe the serious adverse events occurring within 30 days among participants who have received one dose of Menactra® vaccine.