Immunogenicity and Safety of MCV4 in Volunteers Aged 6 Months-5 Years

NCT06314685 | Active Not Recruiting Phase 3

• 1 other identifier: 2020040C-2
• Study Type: interventional
• Target: 2,450
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to evaluate the immunogenicity and safety of Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine in healthy volunteers aged from 3 months to 5 years old.

Conditions

Healthy Population

Keywords

Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine; MCV4

Outcome Measures

Primary Outcomes (1)

• Antibody positive conversion rate

  Immunogenicity study of Meningococcal ACYW135 Polysaccharide Conjugate Vaccine as assessed by positive conversion rate (4-fold increase)

  30 day after primary immunization

Study Arms (3)

6~11 months old

EXPERIMENTAL

For children aged 6-11 months, they was randomly assigned in a 1:1 ratio to the experimental group and control group, and basic immunization was performed following a 0,1-month schedule. And the experimental group received one dose of booster immunization at 18 months old;

Biological: Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine; Biological: Group A and C Meningococcal Polysaccharide Vaccine

12~23 months old

EXPERIMENTAL

For infants aged 12-23 months, they was randomly assigned in a 1:1:1 ratio to the two-dose experimental group, one-dose experimental group, and two-dose control group. For the 12-23 month-olds in the two-dose group, they received two doses of immunization according to a 0, 1-month schedule; while those in the one-dose group receive a single dose of immunization.

Biological: Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine; Biological: Group A and C Meningococcal Polysaccharide Vaccine

2~5 years old

EXPERIMENTAL

For children aged 2-5 years, they were randomly assigned in a 1:1 ratio to the experimental group and control group and received a single dose of immunization.

Biological: Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine; Biological: Group ACYW135 Meningococcal Polysaccharide Vaccine

Interventions

Group ACYW135 Meningococcal Polysaccharide Conjugate Vaccine BIOLOGICAL

As a experimental vaccine for 6 months to 5 years old.

12~23 months old; 2~5 years old; 6~11 months old

Group A and C Meningococcal Polysaccharide Vaccine BIOLOGICAL

As a control vaccine for ages 6-11 months and 12-23 months.

12~23 months old; 6~11 months old

Group ACYW135 Meningococcal Polysaccharide Vaccine BIOLOGICAL

As a control vaccine for ages 2-5 years.

2~5 years old

Eligibility Criteria

• Age: 6 Months - 5 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17)

You may qualify if:

• For primary immunization stage:
• Subjects aged 6 months-5 years;
• Subjects should be full-term (37-42 weeks of gestation) and their birth weight should meet the requirements (2500g ≤ body weight ≤ 4000g);
• Axillary body temperature ≤ 37.0 ℃;
• The guardian of the subject voluntarily agrees to the child's participation in the study and signs an informed consent form;
• The guardians of the subjects have the ability to understand the research procedures and participate in all planned follow-up visits;
• Infants and young children aged 6 to 23 months have not received the meningococcal conjugate vaccine. If they have been vaccinated with group A meningococcal polysaccharide vaccine, the interval between vaccination and the previous dose should exceed 3 months;
• Children aged 2-5 who have not been vaccinated with meningococcal conjugate vaccine, if they have been vaccinated with meningococcal polysaccharide vaccine (including group A meningococcal polysaccharide vaccine, group A and C meningococcal polysaccharide vaccine, and group ACYW135 meningococcal polysaccharide vaccine), the interval between the last dose should exceed 12 months;
• Subjects had no vaccination history of other live attenuated vaccines (such as BCG vaccine, live attenuated polio vaccine, rotavirus vaccine, etc.) within 14 days before vaccination, and no vaccination history of other non live vaccines (such as hepatitis B vaccine, inactivated polio vaccine, DPT vaccine, etc.) within 7 days.
• Subjects who have not been vaccinated with meningococcal group A and C conjugate vaccine at the aged of 3-5 months;
• Subjects who had no history of other live vaccines within 14 days before vaccination and no history of other inactivated vaccines within 7 days;
• For booster immunization stage (applicable to the 6-11 month age group):
• Infants and young children who have been enrolled in this clinical trial between 6 and 11 months of age and have reached the age of 18 months;
• Infants and young children who have completed basic immunization in this clinical trial;
• According to the opinions of the researchers, the subjects and their guardians are able to comply with the requirements of the clinical trial protocol.

You may not qualify if:

• For primary immunization stage:
• Have a history of severe allergic reactions that require medical intervention; Have a history of allergies to vaccines or vaccine ingredients (such as lactose, sodium chloride, tetanus toxoids, etc.), and other serious adverse reactions to vaccines;
• Has contraindications for intramuscular injection such as thrombocytopenia, any coagulation dysfunction, or undergoing anticoagulant therapy;
• Has severely abnormal labor (dystocia, instrumental delivery, excluding cesarean section), or history of asphyxia, neurological damage, in vitro fertilization or multiple pregnancy, pathological jaundice (only applicable to infants and young children aged 6-11 months);
• Suffering from serious congenital malformations or chronic diseases that may interfere with the progress or completion of the study (including but not limited to Down's syndrome, thalassemia (the first degree relatives in the family are thalassemia or gene carriers of thalassemia), heart disease, kidney disease, diabetes, autoimmune diseases (repeated perianal abscesses), hereditary allergies, Guillain Barre syndrome, etc.);
• Infectious diseases with clinical or serological evidence, such as tuberculosis, hepatitis B, hepatitis C, human immunodeficiency virus (HIV) infection or HIV infected parents;
• Any situation resulting in splenomegaly, splenectomy, or functional splenomegaly;
• Has a history of convulsions, epilepsy, encephalopathy, and mental illness (including family history);
• Within 3 days prior to the first dose of the vaccine, there was an acute illness or acute exacerbation of a chronic disease, or the use of antipyretic, analgesic, and anti allergic drugs (such as acetaminophen, ibuprofen, aspirin, etc.);
• Congenital or acquired immunodeficiency; Or receive systemic corticosteroid treatment (any medication route, ≥ 2mg/kg/day) for ≥ 14 days within 3 months prior to enrollment, such as prednisone, inhaled steroids budesonide, fluticasone, etc; Or being using other immunosuppressants such as cyclosporine, tacrolimus, etc. before enrollment;
• Has given immunoglobulin and/or any blood products (except hepatitis B immunoglobulin) within 3 months before enrollment;
• Plan to move before the end of the study visit or leave the local area for a long time during the scheduled study visit;
• Plan to participate or be participating in any other drug clinical research;
• According to the researcher's judgment, there are any other factors that are not suitable for the subjects to participate in the clinical trial.
• For booster immunization stage (applicable to the 6-11 month age group) and immune persistence stage (applicable to the 12-23 month age group):

Sponsors & Collaborators

• Beijing Zhifei Lvzhu Biopharmaceutical Co., Ltd: lead

Study Sites (1)

Hunan Center for Disease Control and Prevention

Changsha, Hunan, 410005, China

Location

Study Officials

• Lin Du

  Beijing Zhifei Lvzhu Biopharmaceutical Co., Ltd

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: phase 3
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 11, 2024
• First Posted: March 18, 2024
• Study Start: December 10, 2021
• Primary Completion: August 30, 2024
• Study Completion: August 30, 2024
• Last Updated: April 3, 2024

Record last verified: 2024-02

Locations

CN (1)