Study to Evaluate the Safety and Immunogenicity of Nimenrix (Registered) in Healthy Infants, Given at 3 and 12 Months of Age

Phase 3CompletedNCT04819113

Pfizer149 enrolled

Overview

This study will evaluate the safety and immunogenicity of a single dose of Nimenrix in infants at 3 months of age, followed by a second dose at 12 months of age. Current posology allows for 2 doses of Nimenrix before 6 months of age, where the first dose is administered from 6 weeks onwards with a second dose at least 2 months later, with a booster at 12 months; and in infants from 6 months of age, a single dose at 6 months, with a booster dose at 12 months. This study will provide valuable immunogenicity and safety data for a single dose in healthy infants \<6 months of age, followed by the booster at 12 months

Study Type

INTERVENTIONAL

Allocation

Purpose

PREVENTION

Masking

NONE

Enrollment

149

Conditions

Meningococcal Vaccine

Interventions

Eligibility

Sex: ALLMin age: 76 DaysMax age: 104 DaysHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Male or female infants born at \>36 weeks of gestation and who are 3 months of age (≥76 to ≤104 days) at the time of consent (the day of birth is considered day of life 1). * Participants whose parent(s)/legal guardian(s) is willing and able to comply with scheduled visits, treatment plan, and other study procedures. * Healthy infants determined by clinical assessment, including medical history and clinical judgment, to be eligible for the study. * Participants who are available for the duration of the study and whose parent(s)/legal guardian(s) can be contacted by telephone during study participation. * Participants whose parent(s)/legal guardian(s) is capable of giving signed informed consent. Exclusion Criteria: * Previous anaphylactic reaction to any vaccine or vaccine-related component. * Bleeding diathesis or condition associated with prolonged bleeding time that would contraindicate intramuscular injection. * History of microbiologically proven disease caused by N meningitidis or Neisseria gonorrhoeae. * Significant neurological disorder or history of seizure (including simple febrile seizure). * Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required). * Family history of congenital or hereditary immunodeficiency. * Other medical or psychiatric condition, including recent or active suicidal ideation/behavior, or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study. * Major known congenital malformation or serious chronic disorder. * Previous vaccination with any meningococcal vaccine containing groups A, C, W, or Y.

Locations (16)

Tampere Vaccine Research Clinic

Tampere, Pirkanmaa, Finland

Jarvenpaa Vaccine Research Center

Jarvenpaa, Uusimaa, Finland

Espoo Vaccine Research Clinic

Espoo, Finland

FVR, Etelä-Helsingin rokotetutkimusklinikka

Helsinki, Finland

Helsinki South Vaccine Research Clinic

Helsinki, Finland

Helsinki East Vaccine Research Clinic

Helsinki, Finland

Jarvenpaa Vaccine Research Center

Jarvenpaa, Finland

Turku Vaccine Research Clinic

Turku, Finland

IN VIVO Bydgoszcz

Bydgoszcz, Poland

NZOZ Przychodnia Vitamed

Bydgoszcz, Poland

...and 6 more locations

Outcomes

Primary Outcomes

Percentage of Participants With Local Reactions Within 7 Days After Vaccination 2

Local reactions included pain at injection site, redness and swelling and were recorded by the participant's parents/legal guardians in an electronic diary (e-diary). Redness and swelling were measured and recorded in measuring device units. 1 measuring device unit =0.5 centimeter (cm) and graded as mild: greater than (\>) 0.0 to 2.0 cm; moderate: \>2.0 to 7.0 cm; and severe: \>7.0 cm. Pain at injection site was graded as mild: hurts if gently touched; moderate: hurts if gently touched with crying; severe: limited limb movement. Exact 2-sided confidence interval (CI) was based on the Clopper and Pearson method.

Time frame: Within 7 days after vaccination 2

Percentage of Participants With Systemic Events Within 7 Days After Vaccination 2

Systemic events included fever, decreased appetite, increased sleep and irritability and were recorded by the participant's parents/legal guardians in an e-diary. Fever was defined as temperature greater than or equal to (\>=) 38.0 degrees (deg) Celsius (C), categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C,\>38.9 to 40.0 deg C and \>40.0 deg C; decreased appetite graded as mild: decreased interest in eating, moderate: decreased oral intake and severe: refusal to feed; increased sleep graded as mild: increased or prolonged sleeping bouts, moderate: slightly subdued, interfered with daily activity and severe: disabling, not interested in usual daily activity; irritability graded as mild: easily consolable, moderate: required increased attention and severe: inconsolable, crying could not be comforted. Exact 2-sided CI was based on Clopper and Pearson method.

Time frame: Within 7 days after vaccination 2

Percentage of Participants With Use of Antipyretic Medication Within 7 Days After Vaccination 2

The use of antipyretic medication was recorded by the participant's parents/legal guardians in an e-diary for 7 days after vaccination. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 7 days after vaccination 2

Percentage of Participants With Adverse Events (AEs) Within 30 Days After Vaccination 2

An AE was any untoward medical occurrence in a participant, temporally associated with the use of investigational product, whether or not considered related to the investigational product. Exact 2-sided CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e., excluding local reactions and systemic events) were reported in this outcome measure.

Time frame: Within 30 days after vaccination 2

Percentage of Participants With Serious Adverse Events (SAEs) Within 30 Days After Vaccination 2

Time frame: Within 30 days after vaccination 2

Percentage of Participants With Newly Diagnosed Chronic Medical Conditions (NDCMCs) Within 30 Days After Vaccination 2

An NDCMC was defined as a significant disease or medical condition, not previously identified, that was expected to be persistent or was otherwise long-lasting in its effects. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 30 days after vaccination 2

Percentage of Participants With Immediate AE Within 30 Minutes After Vaccination 2

Immediate AEs were defined as AEs occurring within the first 30 minutes after administration of the investigational product. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 30 minutes after vaccination 2

Percentage of Participants Achieving Serum Bactericidal Assay Using Rabbit Complement (rSBA) Titers >=1:8 for Each Serogroup, Neisseria Meningitidis Group (Men) A, MenC, MenW-135 and MenY at Baseline: Post Dose 2 Evaluable Immunogenicity Population

Percentage of participants achieving rSBA titer \>=1:8 for each serogroup MenA, MenC, MenW-135 and MenY at baseline in participants who received vaccinations 1 and 2 were reported in this outcome measure. Exact 2-sided CI using the Clopper and Pearson method was presented. Analysis was performed on Post Dose (PD) 2 Evaluable Immunogenicity Population (EIP) (PD2 EIP).

Time frame: At baseline (before vaccination 1)

Percentage of Participants Achieving rSBA Titers >= 1:8 for Each Serogroup MenA, MenC, MenW-135 and MenY at 1 Month After Vaccination 1: Post Dose 2 Evaluable Immunogenicity Population

Percentage of participants achieving rSBA titer \>=1:8 for each serogroup MenA, MenC, MenW-135 and MenY at 1 month after vaccination 1 in participants who received vaccination 1 and 2 were reported in this outcome measure. Exact 2-sided CI using the Clopper and Pearson method was presented.

Time frame: 1 month after vaccination 1

Percentage of Participants Achieving rSBA Titers >= 1:8 for Each Serogroup MenA, MenC, MenW-135 and MenY at Vaccination 2: Post Dose 2 Evaluable Immunogenicity Population

Percentage of participants achieving rSBA titer \>=1:8 for each serogroup MenA, MenC, MenW-135 and MenY at vaccination 2 in participants who received vaccination 1 and 2 were reported in this outcome measure. Exact 2-sided CI using the Clopper and Pearson method was presented.

Time frame: At vaccination 2

Percentage of Participants Achieving rSBA Titers >= 1:8 for Each Serogroup MenA, MenC, MenW-135 and MenY at 1 Month After Vaccination 2: Post Dose 2 Evaluable Immunogenicity Population

Percentage of participants achieving rSBA titer \>=1:8 for each serogroup MenA, MenC, MenW-135 and MenY at 1 month after vaccination 2 in participants who received vaccination 1 and 2 were reported in this outcome measure. Exact 2-sided CI using the Clopper and Pearson method was presented.

Time frame: 1 month after vaccination 2

Geometric Mean Titers (GMTs) of rSBA Titer for Each of MenA, MenC, MenW-135 and MenY Serogroups at Baseline: Post Dose 2 Evaluable Immunogenicity Population

GMT was derived by calculating the mean on the natural log scale based on the t-distribution, then exponentiating the results. CIs were obtained by exponentiating the limits of CIs for the mean logarithm of the rSBA titers (based on the Student t distribution).

Time frame: At baseline (before vaccination 1)

GMTs of rSBA Titer for Each of MenA, MenC, MenW-135 and MenY Serogroups at 1 Month After Vaccination 1: Post Dose 2 Evaluable Immunogenicity Population

Time frame: 1 month after vaccination 1

GMTs of rSBA Titer for Each of MenA, MenC, MenW-135 and MenY Serogroups at Vaccination 2: Post Dose 2 Evaluable Immunogenicity Population

Time frame: At vaccination 2

GMTs of rSBA Titer for Each of MenA, MenC, MenW-135 and MenY Serogroups at 1 Month After Vaccination 2: Post Dose 2 Evaluable Immunogenicity Population

Time frame: 1 month after vaccination 2

Secondary Outcomes

Percentage of Participants With Local Reactions Within 7 Days After Vaccination 1

Local reactions included pain at injection site, redness and swelling and were recorded by the participant's parents/legal guardians in an e-diary. Redness and swelling were measured and recorded in measuring device units. 1 measuring device unit =0.5 cm and graded as mild: \>0.0 to 2.0 cm; moderate: \>2.0 to 7.0 cm; and severe: \>7.0 cm. Pain at injection site was graded as mild: hurts if gently touched; moderate: hurts if gently touched with crying; severe: limited limb movement. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 7 days after vaccination 1

Percentage of Participants With Systemic Events Within 7 Days After Vaccination 1

Systemic events included fever, decreased appetite, increased sleep and irritability and were recorded in e-diary. Fever was defined as temperature \>=38.0 deg C, categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C,\>38.9 to 40.0 deg C and \>40.0 deg C; decreased appetite graded as mild: decreased interest in eating, moderate: decreased oral intake and severe: refusal to feed; increased sleep graded as mild: increased or prolonged sleeping bouts, moderate: slightly subdued, interfered with daily activity and severe: disabling, not interested in usual daily activity; irritability graded as mild: easily consolable, moderate: required increased attention and severe: inconsolable, crying could not be comforted. Exact 2-sided CI was based on Clopper and Pearson method.

Time frame: Within 7 days after vaccination 1

Percentage of Participants With Use of Antipyretic Medication Within 7 Days After Vaccination 1

The use of antipyretic medication was recorded by the participant's parents/legal guardians in an e-diary for 7 days after vaccination. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 7 days after vaccination 1

Percentage of Participants With AEs Within 30 Days After Vaccination 1

An AE was any untoward medical occurrence in a participant, temporally associated with the use of investigational product, whether or not considered related to the investigational product. Exact 2-sided CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e. excluding local reactions and systemic events) were reported in this outcome measure.

Percentage of Participants With SAEs and NDCMCs: Within 30 Days After Vaccination 1, From 1 Month After Vaccination 1 to 9 Months After Vaccination 1, From Vaccination 1 to 9 Months After Vaccination 1

An SAE was any untoward medical occurrence that, at any dose: resulted in death; required inpatient hospitalization or prolongation of existing hospitalization; was life-threatening; resulted in persistent disability/incapacity; congenital anomaly/birth defect and other important medical events. An NDCMC was defined as a significant disease or medical condition, not previously identified, that was expected to be persistent or was otherwise long-lasting in its effects. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 30 days after vaccination 1, from 1 month after vaccination 1 to 9 months after vaccination 1 and from vaccination 1 to 9 months after vaccination 1

Percentage of Participants With Immediate AE Within 30 Minutes After Vaccination 1

Immediate AEs were defined as AEs occurring within the first 30 minutes after administration of the investigational product. Exact 2-sided CI was based on the Clopper and Pearson method.

Time frame: Within 30 minutes after vaccination 1

Percentage of Participants Achieving rSBA Titers >= 1:8 for Each Serogroup MenA, MenC, MenW-135 and MenY at Baseline and 1 Month After Vaccination 1: Post Dose 1 Evaluable Immunogenicity Population

Percentage of participants achieving rSBA titer \>=1:8 for each serogroup MenA, MenC, MenW-135 and MenY at baseline and 1 month after Vaccination 1 in participants who received Vaccination 1 were reported in this outcome measure. Exact 2-sided CI using the Clopper and Pearson method was presented. Analysis was performed on post-dose 1 (PD1) evaluable immunogenicity population (EIP).