NCT07203755

Brief Summary

This clinical trial is conducted in two parts. Part One employs a randomized, partially blinded, dose-escalation, partially active-controlled design. Part Two utilizes a randomized, blinded, placebo-controlled design. Part One is divided into four stages based on age and vaccine dose levels. Part Two consists of the 2-month-old vaccine/placebo groups.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
260

participants targeted

Target at P75+ for phase_1

Timeline
33mo left

Started Dec 2025

Typical duration for phase_1

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress12%
Dec 2025Feb 2029

First Submitted

Initial submission to the registry

September 25, 2025

Completed
7 days until next milestone

First Posted

Study publicly available on registry

October 2, 2025

Completed
3 months until next milestone

Study Start

First participant enrolled

December 19, 2025

Completed
3.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

February 1, 2029

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

February 1, 2029

Last Updated

December 31, 2025

Status Verified

September 1, 2025

Enrollment Period

3.1 years

First QC Date

September 25, 2025

Last Update Submit

December 25, 2025

Conditions

Keywords

Combined VaccineSafetyImmunogenicityAges 2 months to 6 years

Outcome Measures

Primary Outcomes (1)

  • Incidence of adverse reactions

    Parts I and II: Within 14 days after each dose

Secondary Outcomes (25)

  • Incidence of adverse events

    Part I Sections 1A, 2A, 2B: Within 14 days after exemption

  • Incidence of adverse events

    Part I Sections 3A, 3B, 3C, 3D, 3E, 4A and Part II: Within 14 days after each dose

  • Incidence of adverse reactions/events

    Part I Sections 1A, 2A, 2B: Within 30 minutes after exemption

  • Incidence of adverse reactions/events

    Part I Sections 3A, 3B, 3C, 3D, 3E, 4A and Part II: Within 30 minutes after each dose

  • Incidence of adverse reactions/events

    Part I Sections 1A, 2A, 2B: Within 30 days after exemption

  • +20 more secondary outcomes

Study Arms (11)

Part I, 1A, low dose, 6 year-old

EXPERIMENTAL

One dose of DTcP-Hib-MCV4 on Day 0

Biological: Adsorbed Acellular Pertussis (3-Component) Diphtheria-Tetanus-Pertussis-Haemophilus influenzae type b (Conjugate)-Meningococcal Group ACYW135 (Conjugate) Combined Vaccine (DTcP-Hib-MCV4)

Part I, 2A, low dose, 18~24 month-old

EXPERIMENTAL

One dose of DTcP-Hib-MCV4 on Day 0

Biological: DTcP-Hib-MCV4

Part I, 2B, high dose, 18~24 month-old

EXPERIMENTAL

One dose of DTcP-Hib-MCV4 on Day 0

Biological: DTcP-Hib-MCV4

Part I, 3A, low dose, 2 month-old

EXPERIMENTAL

3 doses of DTcP-Hib-MCV4 at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Biological: DTcP-Hib-MCV4

Part I, 3B, high dose, 2 month-old

EXPERIMENTAL

3 doses of DTcP-Hib-MCV4 at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Biological: DTcP-Hib-MCV4

Part I, 3C, 2 month-old

ACTIVE COMPARATOR

3 doses of DTcP at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Biological: Adsorbed Acellular Pertussis (3-Component) Diphtheria-Tetanus-Pertussis (DTcP)

Part I, 3D, 2 month-old

ACTIVE COMPARATOR

3 doses of Hib at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Biological: Haemophilus influenzae type b (Conjugate) (Hib)

Part I, 3E, 2 month-old

ACTIVE COMPARATOR

3 doses of MCV4 at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Biological: Meningococcal Group ACYW135 (Conjugate) (MCV4)

Part I, 4A, 3 month-old

ACTIVE COMPARATOR

3 doses of MCV4 at 0, 1, and 2 months, followed by a booster dose at 12 months of age.

Biological: MCV4

Part II, Vaccine Group, 2 month-old

EXPERIMENTAL

3 doses of MCV4 at 0, 2, and 4 months.

Biological: MCV4

Part II, Placebo Group, 2 month-old

PLACEBO COMPARATOR

3 doses of NS at 0, 2, and 4 months.

Other: Sodium Chloride Injection (0.9%) (Saline Solution) (NS)

Interventions

DTcP-Hib-MCV4BIOLOGICAL

1 dose of DTcP-Hib-MCV4 vaccine (0.5ml) on day 0

Part I, 2A, low dose, 18~24 month-old

3 doses of DTcP (0.5ml) at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Part I, 3C, 2 month-old

3 doses of Hib (0.5ml) at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Part I, 3D, 2 month-old

3 doses of MCV4 (0.5ml) at 0, 2, and 4 months, followed by a booster dose at 18-24 months of age.

Part I, 3E, 2 month-old
MCV4BIOLOGICAL

3 doses of MCV4 (0.5ml) at 0, 1, and 2 months, followed by a booster dose at 12 months of age.

Part I, 4A, 3 month-old

3 doses of NS (0.5ml) at 0, 2, and 4 months.

Part II, Placebo Group, 2 month-old

Eligibility Criteria

Age2 Months - 6 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17)

You may qualify if:

  • Participants aged 2 months (60-89 days), 3 months (90-119 days), 18-24 months, and 6 years of age, with legal guardians or authorized representatives willing to provide identification documentation;
  • Legal guardians or authorized representatives provide informed consent, voluntarily sign the informed consent form, and are able to comply with the requirements of the clinical trial protocol;
  • Individuals aged 18-24 months who have completed a 3-dose DTaP-containing vaccine series and a meningococcal-containing vaccine primary series, but have not received a DTaP-containing booster dose;
  • Individuals aged 6 years who have completed 4 doses of DTaP-containing vaccine but have not received the 5th DTaP-containing vaccine dose; and have only completed the first meningococcal-containing vaccine booster dose, without receiving the second meningococcal-containing vaccine booster dose at age 6.

You may not qualify if:

  • Infants born prematurely (delivery before 37 weeks gestation) or with low birth weight (\<2500g) at 2 months (60-89 days) or 3 months (90-119 days) of age;
  • Infants aged 2 months (60-89 days) or 3 months (90-119 days) with history of abnormal labor, asphyxia requiring resuscitation, or neurological impairment;
  • Severe congenital malformations or developmental disorders, genetic defects, or severe malnutrition;
  • History of severe adverse reactions or anaphylaxis to vaccines or vaccine components, such as urticaria, dyspnea, angioedema;
  • History of epilepsy, convulsions, seizures, cerebral palsy, psychiatric disorders, or family history thereof; or history of progressive neurological diseases (e.g., Guillain-Barré syndrome, brachial plexus neuritis);
  • Diagnosed with congenital or acquired immunodeficiency, HIV infection, lymphoma, leukemia, systemic lupus erythematosus (SLE), juvenile rheumatoid arthritis (JRA), or other autoimmune diseases;
  • Acute illness (e.g., fever ≥38.5°C, diarrhea) or acute exacerbation of chronic disease within 3 days prior to receiving the investigational product;
  • Known or suspected severe chronic diseases (including: severe respiratory disease, severe cardiovascular disease, liver/kidney disease, severe dermatology conditions, malignancies, etc.);
  • Current anal abscess or severe eczema;
  • Clinically diagnosed coagulation disorders (e.g., factor deficiency, bleeding disorders, platelet abnormalities) or significant bruising/coagulation impairment;
  • Asplenia, functional asplenia, or splenectomy due to any cause;
  • Continuous treatment with immunosuppressants, immunomodulators, or cytotoxic agents (exceeding 10 days) within the past 6 months; inhaled or topical steroids are permitted;
  • Receipt of blood products or immunoglobulins (excluding hepatitis B immunoglobulin) within the past 3 months;
  • Received an injectable live attenuated vaccine within 14 days, or any other vaccine within 7 days;
  • Taken antipyretic analgesics or antiallergic medications within 3 days;
  • +13 more criteria

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Liangyuan District Center for Disease Control and Prevention, Shangqiu City

Shangqiu, Henan, China

RECRUITING

MeSH Terms

Conditions

DiphtheriaTetanusMeningitis, MeningococcalHaemophilus Infections

Interventions

Vaccines, CombinedSodium ChlorideSaline Solution

Condition Hierarchy (Ancestors)

Corynebacterium InfectionsActinomycetales InfectionsGram-Positive Bacterial InfectionsBacterial InfectionsBacterial Infections and MycosesInfectionsClostridium InfectionsMeningitis, BacterialCentral Nervous System Bacterial InfectionsMeningococcal InfectionsNeisseriaceae InfectionsGram-Negative Bacterial InfectionsCentral Nervous System InfectionsCentral Nervous System DiseasesNervous System DiseasesMeningitisNeuroinflammatory DiseasesPasteurellaceae Infections

Intervention Hierarchy (Ancestors)

VaccinesBiological ProductsComplex MixturesChloridesHydrochloric AcidChlorine CompoundsInorganic ChemicalsSodium CompoundsCrystalloid SolutionsIsotonic SolutionsSolutionsPharmaceutical Preparations

Study Officials

  • Yanxia Wang

    Henan Center for Disease Control and Prevention

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Study Design

Study Type
interventional
Phase
phase 1
Allocation
RANDOMIZED
Masking
QUADRUPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Part One: Partial Blind Method Design Part Two: Blind Method Design
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR

Study Record Dates

First Submitted

September 25, 2025

First Posted

October 2, 2025

Study Start

December 19, 2025

Primary Completion (Estimated)

February 1, 2029

Study Completion (Estimated)

February 1, 2029

Last Updated

December 31, 2025

Record last verified: 2025-09

Locations