A Phase 3 interventional study of Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid Conjugate and Meningococcal (Groups A, C, Y and W 135) Oligosaccharide Diphtheria CRM197 Conjugate Vaccine in Meningitis, Meningococcal Meningitis and Meningococcal Infections, sponsored by Sanofi Pasteur, a Sanofi Company. Completed at 36 sites in 2 countries. Open to participants aged 2 Years to 9 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-03-28.
Sponsored by Sanofi Pasteur, a Sanofi Company · Phase 3, Interventional, and Prevention
The purpose of the study was to evaluate the immunogenicity and describe the safety of Meningococcal Polysaccharide (Serogroups A, C, Y and W) Tetanus Toxoid (MenACYW) Conjugate vaccine compared to the licensed Meningococcal (Groups A, C, Y and W 135) Oligosaccharide Diphtheria CRM197 (MENVEO®) vaccine in children 2 to 9 years of age in the United States (US) and Puerto Rico.
Primary objective:
Secondary objectives:
Observational objective:
Healthy children were randomized and received a single dose of either MenACYW Conjugate vaccine or MENVEO®. They were assessed for immunogenicity at baseline (pre-vaccination) and at 30-44 days post-vaccination. Safety information were collected post-vaccination and throughout the entire study.
219 studies on the registry are indexed under Meningococcal Infections; 6 are open to participants now.
This study's enrollment of 1,000 is above the median of 450 across 190 interventional studies indexed under Meningococcal Infections.
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Exclusion Criteria:
Healthy, meningococcal-vaccine naïve participants aged 2 to 9 years received a single dose of MenACYW Conjugate vaccine on Day 0.
Biological: Meningococcal Polysaccharide (Serogroups A, C, Y, and W) Tetanus Toxoid Conjugate
Healthy, meningococcal-vaccine naïve participants aged 2 to 9 years received a single dose of MENVEO® Conjugate vaccine on Day 0.
Biological: Meningococcal (Groups A, C, Y and W 135) Oligosaccharide Diphtheria CRM197 Conjugate Vaccine
0.5 milliliter (mL), Intramuscular
Also known as: MenACYW Conjugate vaccine
0.5 mL, Intramuscular
Also known as: MENVEO®
Percentage of Participants Achieving Seroresponse Measured by Serum Bactericidal Assay Using Human Complement (hSBA) Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse against serogroups A, C, Y, and W was defined as post-vaccination hSBA titers greater than or equal to (\>=) 1:16 for participants with pre-vaccination hSBA titers less than (\<) 1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
Time frame: Day 30 (post-vaccination)
Geometric Mean Titers (GMTs) of Antibodies Against Meningococcal Serogroups A, C, Y, and W Measured by hSBA Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine in Children 2 to 9 Years of Age
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA.
Time frame: Day 30 (post-vaccination)
Geometric Mean Titers of Antibodies Against Meningococcal Serogroups A, C, Y, and W Measured by hSBA Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine in Children 2 to 5 Years of Age
Antibody titers against meningococcal serogroups A, C, Y, and W measured by hSBA.
Time frame: Day 30 (post-vaccination)
Geometric Mean Titers of Antibodies Against Meningococcal Serogroups A, C, Y, and W Measured by hSBA Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine in Children 6 to 9 Years of Age
Antibody titers against meningococcal serogroups A, C, Y, and W measured by hSBA.
Time frame: Day 30 (post-vaccination)
Percentage of Participants Achieving Vaccine Seroresponse Measured by hSBA Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine in Children 2 to 5 Years of Age
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse for serogroups A, C, Y, and W was defined as post-vaccination hSBA titers \>=1:16 for participants with pre-vaccination hSBA titers \<1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
Time frame: Day 30 (post-vaccination)
Percentage of Participants Achieving Vaccine Seroresponse Measured by hSBA Against Meningococcal Serogroups A, C, Y, and W Following Vaccination With Either MenACYW Conjugate Vaccine or MENVEO® Vaccine in Children 6 to 9 Years Age
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse for serogroups A, C, Y, and W was defined as post-vaccination hSBA titers \>=1:16 for participants with pre-vaccination hSBA titers \<1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
Time frame: Day 30 (post-vaccination)
Study participants were enrolled in 36 centers in the United States (US) and Puerto Rico from 17 February 2017 to 30 March 2017.
| Milestone | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Started | 499 | 501 |
| Safety analysis set (safas) | 498 | 494 |
| Completed | 487 | 487 |
| Not completed | 12 | 14 |
| Withdrew: Protocol violation | 3 | 5 |
| Withdrew: Withdrawal by subject | 3 | 6 |
| Withdrew: Lost to follow-up | 6 | 3 |
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse against serogroups A, C, Y, and W was defined as post-vaccination hSBA titers greater than or equal to (\>=) 1:16 for participants with pre-vaccination hSBA titers less than (\<) 1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
| percentage of participants | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 55.4 (50.7 to 60.0) | 47.8 (43.2 to 52.5) |
| Serogroup C | 95.2 (92.8 to 97.0) | 47.8 (43.2 to 52.5) |
| Serogroup Y | 91.5 (88.5 to 93.9) | 79.3 (75.3 to 82.9) |
| Serogroup W | 78.8 (74.8 to 82.5) | 64.1 (59.5 to 68.4) |
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA.
| titers (1/dilution) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 24.8 (21.9 to 27.9) | 22.6 (19.7 to 26.0) |
| Serogroup C | 238 (209 to 270) | 17.0 (14.3 to 20.2) |
| Serogroup Y | 68.8 (61.3 to 77.3) | 43.5 (37.7 to 50.4) |
| Serogroup W | 37.5 (33.7 to 41.8) | 26.2 (23.0 to 29.9) |
Antibody titers against meningococcal serogroups A, C, Y, and W measured by hSBA.
| titers (1/dilution) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 21.6 (18.2 to 25.5) | 18.9 (15.5 to 23.0) |
| Serogroup C | 208 (175 to 246) | 11.9 (9.79 to 14.6) |
| Serogroup Y | 49.8 (43.0 to 57.6) | 36.1 (29.2 to 44.7) |
| Serogroup W | 28.8 (24.6 to 33.7) | 20.1 (16.7 to 24.2) |
Antibody titers against meningococcal serogroups A, C, Y, and W measured by hSBA.
| titers (1/dilution) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 28.4 (23.9 to 33.8) | 26.8 (22.0 to 32.6) |
| Serogroup C | 272 (224 to 330) | 23.7 (18.2 to 31.0) |
| Serogroup Y | 95.1 (80.2 to 113) | 51.8 (42.5 to 63.2) |
| Serogroup W | 48.9 (42.5 to 56.3) | 33.6 (28.2 to 40.1) |
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse for serogroups A, C, Y, and W was defined as post-vaccination hSBA titers \>=1:16 for participants with pre-vaccination hSBA titers \<1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
| percentage of participants | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 52.4 (45.7 to 59.1) | 44.8 (38.1 to 51.6) |
| Serogroup C | 94.3 (90.5 to 96.9) | 43.2 (36.6 to 50.0) |
| Serogroup Y | 88.2 (83.3 to 92.1) | 77.0 (70.9 to 82.4) |
| Serogroup W | 73.8 (67.6 to 79.4) | 61.3 (54.5 to 67.7) |
Antibody titers against meningococcal serogroups A, C, Y, and W were measured by hSBA. The hSBA vaccine seroresponse for serogroups A, C, Y, and W was defined as post-vaccination hSBA titers \>=1:16 for participants with pre-vaccination hSBA titers \<1:8 or at least a 4-fold increase in hSBA titers from pre- to post-vaccination for participants with pre-vaccination hSBA titers \>=1:8.
| percentage of participants | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Serogroup A | 58.3 (51.6 to 64.8) | 50.6 (44.1 to 57.2) |
| Serogroup C | 96.1 (92.7 to 98.2) | 52.1 (45.5 to 58.6) |
| Serogroup Y | 94.8 (91.0 to 97.3) | 81.4 (75.9 to 86.2) |
| Serogroup W | 83.8 (78.4 to 88.4) | 66.7 (60.3 to 72.6) |
Collected over Adverse event (AE) data were collected from Day 0 (post-vaccination) up to 30 days after vaccination. Solicited Reaction (SR) data were collected within 7 days after vaccination. Serious adverse events (SAEs) data were collected throughout the study (up to 180 days after vaccination).. Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Group 1: MenACYW Conjugate Vaccine | 0/498 (0%) | 7/498 (1.4%) | 304/498 (61%) |
| Group 2: MENVEO® Vaccine | 0/494 (0%) | 3/494 (0.6%) | 335/494 (67.8%) |
| Event | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Partial SeizuresNervous system disorders | 0/498 | 1/494 |
| Adenoidal HypertrophyRespiratory, thoracic and mediastinal disorders | 1/498 | 1/494 |
| AsthmaRespiratory, thoracic and mediastinal disorders | 1/498 | 1/494 |
| Tonsillar HypertrophyRespiratory, thoracic and mediastinal disorders | 1/498 | 1/494 |
| OsteomyelitisInfections and infestations | 1/498 | 0/494 |
| Tethered Cord SyndromeNervous system disorders | 1/498 | 0/494 |
| Status AsthmaticusRespiratory, thoracic and mediastinal disorders | 1/498 | 0/494 |
| WheezingRespiratory, thoracic and mediastinal disorders | 1/498 | 0/494 |
| Circulatory CollapseVascular disorders | 1/498 | 0/494 |
| Event | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine |
|---|---|---|
| Injection Site PainGeneral disorders | 188/498 | 206/494 |
| Injection Site ErythemaGeneral disorders | 110/498 | 153/494 |
| MyalgiaMusculoskeletal and connective tissue disorders | 99/498 | 112/494 |
| Injection Site SwellingGeneral disorders | 67/498 | 104/494 |
| MalaiseGeneral disorders | 103/498 | 99/494 |
| HeadacheNervous system disorders | 64/498 | 60/494 |
| Pharyngitis StreptococcalInfections and infestations | 18/498 | 34/494 |
| CoughRespiratory, thoracic and mediastinal disorders | 34/498 | 30/494 |
| PyrexiaGeneral disorders | 20/498 | 27/494 |
| PharyngitisInfections and infestations | 24/498 | 25/494 |
Analysis was performed on all randomized participants.
| Age, Continuous(years) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine | Total |
|---|---|---|---|
| Mean | 6.0 ± 2.33 | 6.0 ± 2.36 | 6.0 ± 2.34 |
| Sex: Female, Male(Participants) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine | Total |
|---|---|---|---|
| Female | 245 | 236 | 481 |
| Male | 254 | 265 | 519 |
| Race (NIH/OMB)(Participants) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine | Total |
|---|---|---|---|
| American Indian or Alaska Native | 1 | 0 | 1 |
| Asian | 2 | 2 | 4 |
| Native Hawaiian or Other Pacific Islander | 4 | 0 | 4 |
| Black or African American | 66 | 61 | 127 |
| White | 402 | 417 | 819 |
| More than one race | 21 | 21 | 42 |
| Unknown or Not Reported | 3 | 0 | 3 |
| Region of Enrollment(Participants) | Group 1: MenACYW Conjugate Vaccine | Group 2: MENVEO® Vaccine | Total |
|---|---|---|---|
| United States | 499 | 501 | 1000 |
Documents are hosted by the registry — open the source record to download them.
Plan to share: Yes — Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org
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Sanofi Pasteur, a Sanofi Company