Pneumococcal Infectious DiseasePhase 1NCT06675032

Phase I Clinical Trial of PCV24 in Children Aged 2 Months (Minimum 6 Weeks) to 17 Years

A Phase 1 study testing PCV24 formulation 1, PCV24 formulation 2 and 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine in people with Pneumococcal Infectious Disease, run by Reinovax Biologics Co., LTD at 1 site in China.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record

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Trial summary

Phase I clinical trial of 24-valent pneumococcal conjugate vaccine (PCV24) developed by Shanghai Reinovax Biologics Co., LTD will be conducted in children aged 2 Months (Minimum 6 Weeks) to 17 Years . The objective of the study is to evaluate the safety tolerability and immunogenicity of PCV24. Read more about this study

Who is it for?: Ages 6 weeks to 17 yearsHealthy volunteers can take part
Conditions the study is for: Pneumococcal Infectious Disease
What is being tested?: PCV24 formulation 1, PCV24 formulation 2 and 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine
Type of treatment: Vaccines, Injection or infusion
Could I receive a placebo?: No, everyone receives an active treatment
How many people: 230 participants
Where: 1 siteChina
Study dates: 27 Apr 2024to 14 Apr 2026
Phase: Phase 1
Are there results?: None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

Ages 6 weeks to 17 years
All sexes
Healthy volunteers accepted
Child

Who may be able to join

Healthy subjects aged 2~3 months (minimum 6 weeks old) and 7 months old~17 years old, and the guardian of the subject can provide valid identification of the subject and the guardian of the subject.
Subjects and/or their guardians voluntarily consent to the subjects to participate in this study and sign the informed consent form.
Subjects and/or their guardians have the ability to understand (non-illiterate) study procedures.
Female subjects and male subjects of childbearing age agree to use effective contraceptive measures within 6 months from the start of the study to the date of immunization.
Those who have completed the full course of primary immunization in accordance with the requirements of this clinical trial, and the age before the booster immunization is 12~15 months old, (the interval between the booster immunization time and the last dose of primary immunization is at least 2 months).
In the opinion of the investigator, the subject's guardian can comply with all the requirements of this clinical trial protocol during the booster phase of the subject.

Who cannot join

Individuals who have previously received any type of pneumococcal vaccine or have a history of invasive disease caused by Streptococcus pneumoniae (confirmed by clinical, serological, or microbiological methods).
Abnormal results from physical examinations or laboratory tests that are deemed clinically significant by a clinician.
Individuals suspected or diagnosed with fever (axillary temperature ≥37.5℃) within 3 days prior to enrollment; or axillary temperature ≥37.3℃ (for those over 14 years old) or ≥37.5℃ (for those 14 years old or younger) on the day of the first vaccine dose.
Within 7 days prior to the first dose of vaccination, there is a history of acute illness or acute exacerbation of chronic disease, and systemic application of antibiotics and antiviral medications has been administered; within 3 days prior to the first dose of vaccination, antipyretics, analgesics, and antihistamines (such as acetaminophen, ibuprofen, aspirin, loratadine, cetirizine, etc.) have been taken.
A history of severe allergy to any component of the vaccine being tested, or a history of severe allergy to any vaccine containing tetanus toxoid, or a previous history of severe allergy to any vaccine or medication (including but not limited to: anaphylactic shock, allergic laryngeal edema, allergic purpura, thrombocytopenic purpura, local allergic necrotic reactions, difficulty breathing, angioedema, etc.); or a previous history of severe adverse reactions after the use of any vaccine or medication.
Subjects who have received inactivated vaccines, subunit vaccines, or recombinant vaccines within 7 days prior to enrollment in the study, or who have received live attenuated vaccines or adenoviral vector vaccines within 14 days prior to enrollment in the study.

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Participants who have received or plan to use any other investigational drug within 3 months prior to the study; those who have received whole blood, plasma, and/or blood products, such as immunoglobulin treatment, within the last 3 months.
History of thrombocytopenia or other coagulation disorders diagnosed by a hospital, or history of anticoagulant treatment.
Known to have a current or past history of infectious diseases, such as active tuberculosis, hepatitis B, hepatitis C, and/or human immunodeficiency virus (HIV) infection.
Known or suspected to have serious chronic diseases, such as liver and kidney diseases, malignant tumors, infections, or allergic skin diseases; or those whose condition is in a progressive stage and cannot be stably controlled.
Infants under 1 year old with abnormal birth weight (less than 2500 g), or abnormal gestational age (gestational age less than 37 weeks or more than 42 weeks), and those born with abnormal delivery (dystocia, instrumental delivery) or with a history of asphyxia or neurological organ damage.
Infants under 1 year old have severe eczema or severe jaundice.
Individuals with severe congenital malformations, developmental disorders, genetic defects, severe malnutrition, or serious chronic diseases (such as Down syndrome, sickle cell anemia, neurological disorders, Guillain-Barré syndrome, etc.).
Neurological diseases or neurodevelopmental disorders (e.g., febrile seizures, epilepsy, encephalopathy, focal neurological deficits, myelitis or transverse myelitis); history of psychosis or family history.
History of congenital or acquired immunodeficiency, immunosuppression, or autoimmune diseases, or having received immunomodulatory treatment within the last 6 months, such as immunosuppressive doses of corticosteroids (dose reference: equivalent to prednisone 20 mg/day for more than 7 days); or monoclonal antibodies; or thymosin; or interferons, etc.; but local medications (such as ointments, eye drops, inhalants, or nasal sprays) are allowed.
Women of childbearing age who are in the breastfeeding period, pregnant, or plan to become pregnant within 6 months after participating in the trial, or have a positive urine pregnancy test result.
It was learned through inquiry that the subject has no spleen or functional asplenia, as well as any conditions leading to asplenia or splenectomy.
The subject's guardian may be unable to comply with the study procedures, adhere to agreements, or permanently relocate from the area before the study is completed, or may leave the local area for an extended period during the scheduled visits.
Researchers believe that any other factors that make the subjects unsuitable for participating in clinical trials may lead to the inability to ensure the maximum benefit for the subjects continuing in the study.
The subjects received other pneumonia vaccines, apart from the experimental vaccine, before the enhanced immunization.
The subject has a history of invasive disease caused by pneumococci prior to enhanced immunization (confirmed by clinical, serological, or microbiological methods).
Researchers believe that if the subjects have any other factors that make them unsuitable for participating in clinical trials, it may lead to the inability to ensure the maximum benefit for the subjects by continuing their participation in the study.
Persons who have received any type of pneumococcal vaccine prior to enrollment or have a previous history of invasive disease caused by Streptococcus pneumoniae (confirmed by any of the clinical, serologic, or microbiologic methods).
Abnormal findings on physical examination or laboratory tests that are clinically significant as determined by a clinician.
Persons with suspected or confirmed fever (axillary temperature ≥37.5°C) within 3 days prior to enrollment; or axillary temperature ≥37.3°C (>14 years of age) or ≥37.5°C (≤14 years of age) prior to (on the day of) the first dose of vaccination.
History of acute illness or acute exacerbation of chronic illness, systemic treatment with antibiotics and antiviral drugs within 7 days prior to the first dose of vaccination; administration of antipyretic, analgesic, and anti-allergic drugs (e.g., acetaminophen, ibuprofen, aspirin, loratadine, cetirizine, etc.) within 3 days prior to the first dose of vaccination.
A history of severe allergy to any component of the test vaccine or to any vaccine containing tetanus toxoid, or a previous history of severe allergy to any vaccine or medication (including, but not limited to: e.g., anaphylactic shock, anaphylactoid laryngeal edema, anaphylactoid purpura, thrombocytopenic purpura, localized anaphylactic necrotic reaction, respiratory distress, angioneurotic edema, etc.); or a previous history of severe side effects to any vaccine or history of severe side effects as described above following drug administration.
Subjects who have received inactivated, subunit, or recombinant vaccines within 7 days prior to study entry, or live attenuated or adenovirus vector vaccines, etc. within 14 days prior to study entry.
Those who have received, or plan to use during the study period, any other investigational drug within 3 months prior to enrollment in the study; those who have received whole blood, plasma/ or blood products, such as immunoglobulin therapy within 3 months.
History of hospital-diagnosed thrombocytopenia or other coagulation disorders or history of anticoagulant therapy.
Known diagnosis of current/past history of infectious diseases such as: active tuberculosis, hepatitis B, hepatitis C and/or human immunodeficiency virus (HIV) infection.
Known or suspected serious chronic diseases, such as liver or kidney diseases, malignant tumors, infections, or allergic skin diseases; or if the condition is in a progressive stage that cannot be controlled smoothly.
Infants less than 1 year of age with abnormal birth weight (<2500 g), or those with abnormal gestational weeks (gestational age <37 or >42 weeks) and births with abnormal labor (obstructed labor, instrumental delivery) or a history of asphyxia or neurological organ damage.
Infants up to 1 year of age with severe eczema or severe jaundice.
Suffering from severe congenital malformations or developmental disorders or genetic defects, severe nutritional deficiencies or severe chronic diseases (e.g. Down's syndrome, sickle cell anemia or neurological disorders, Guillain-Barré syndrome, etc.).
Neurological disorders or neurodevelopmental deficiencies (e.g., febrile convulsions, epilepsy, encephalopathy, focal neurological deficits, encephalomyelitis, or transverse myelitis); history of psychiatric illness or family history.
History of congenital or acquired immunodeficiency, immunosuppression, or autoimmune disease or treatment with immunomodulators within 6 months, such as immunosuppressive doses of glucocorticoids (dosage reference: equivalent to prednisone 20 mg/day for more than 7 days); or monoclonal antibodies; or thymic peptides; or interferon; but topical medications (e.g., ointments, eye drops, inhalers, or nasal sprays) are allowed.
Women of childbearing age who are breastfeeding, pregnant, or planning to become pregnant within 6 months of enrollment, or who have a positive urine pregnancy test result.
Subjects known to be splenic or functionally splenic, and any condition resulting in splenic or splenectomy, upon inquiry.
Subject guardians may not be able to comply with study procedures, keep appointments, or plan to permanently relocate from the area prior to completion of the study or leave the area for an extended period of time during scheduled visits.
In the opinion of the investigator, the subject has any other unsuitable factors for participation in the clinical trial that would make continued participation in the study not assured of maximum benefit to the subject.
Subjects received a pneumonia vaccine other than the experimental vaccine prior to booster immunization.
Subject has a history of invasive disease caused by Streptococcus pneumoniae prior to booster immunization (confirmed by either clinical, serologic, or microbiologic methods).
In the opinion of the investigator, the subject has any other unsuitable factors for participation in the clinical trial that would make continued participation in the study not assured of maximum benefit to the subject.

Trial locations and contacts

1 site in 1 country.

China1 site

Luzhou District Center for Disease Control and Prevention, Changzhi City
Changzhi, Shanxi

Other trials in China

About this study

Official title: Phase I Clinical Trial Protocol of 24-valent Pneumococcal Polysaccharide Conjugate Vaccine (PCV24) to Evaluate the Safety and Immunogenicity in Children Aged 2 Months (Minimum 6 Weeks) to 17 Years

Conditions: Pneumococcal Infectious Disease
Being tested: PCV24 formulation 1, PCV24 formulation 2, 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine, Sodium Chloride Injection
Medical subject headings: Pneumococcal Infections

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

PCV24 formulation 1Biological
Also called 24-Valent Pneumococcal Polysaccharide Conjugate Vaccine
24-Valent Pneumococcal Polysaccharide Conjugate Vaccine formulation 1：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose.
Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.
PCV24 formulation 2Biological
Also called 24-Valent Pneumococcal Polysaccharide Conjugate Vaccine
24-Valent Pneumococcal Polysaccharide Conjugate Vaccine formulation 2：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose.
Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.
13-Valent Pneumococcal Polysaccharide Conjugate VaccineBiological
Also called Prevenar13®
13-Valent Pneumococcal Polysaccharide Conjugate Vaccine:Dosage form: Injection Specification:0.5 mL/strip Dosage: The preferred site for infants is the anterolateral thigh (lateral femoral muscle), and for toddlers and children, the deltoid muscle of the upper arm.
Dosing schedule:6 weeks months: 4 doses, one dose each of basic immunization at 2, 4, and 6 months of age, and one dose of booster immunization at 12-15 months of age, with the earliest of the first dose being given at 6 weeks of age. The first dose should be given at 6 weeks of age at the earliest.
Sodium Chloride InjectionBiological
Sodium Chloride Injection：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose.
Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.

Study groups in NCT06675032
Study group	Role	What they receive
6~17 years old( PCV24 formulation 1)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose. Receives: Biological: PCV24 formulation 1; Biological: Sodium Chloride Injection
6~17 years old(PCV24 formulation 2）	Experimental	Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose. Receives: Biological: PCV24 formulation 2; Biological: Sodium Chloride Injection
24-71 months of age( PCV24 formulation 1)	Experimental	Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose. Receives: Biological: PCV24 formulation 1; Biological: Sodium Chloride Injection
24-71 months of age(PCV24 formulation 2)	Experimental	Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose. Receives: Biological: PCV24 formulation 2; Biological: Sodium Chloride Injection
12-23 months of age( PCV24 formulation 1)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 12-23 months age group: 2 doses, at least 2 months apart. Receives: Biological: PCV24 formulation 1; Biological: Sodium Chloride Injection
12-23 months of age( PCV24 formulation 2)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 12-23 months age group: 2 doses, at least 2 months apart. Receives: Biological: PCV24 formulation 2; Biological: Sodium Chloride Injection
7~11 months of age( PCV24 formulation 1)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 7-11 months age group: 2 doses of primary immunization, with an interval of at least 1 month between the first two doses, and 1 booster dose after 12 months of age. Receives: Biological: PCV24 formulation 1; Biological: Sodium Chloride Injection
7~11 months of age(PCV24 formulation 2)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 7-11 months age group: 2 doses of primary immunization, with an interval of at least 1 month between the first two doses, and 1 booster dose after 12 months of age. Receives: Biological: PCV24 formulation 2; Biological: Sodium Chloride Injection
2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 1)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 6 weeks to 3 months: one dose at the age of 2, 4 and 6 months for basic immunization, one dose at the age of 12~15 months for booster immunization, and the first dose at the earliest age of 6 weeks. Receives: Biological: PCV24 formulation 1; Biological: 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine; Biological: Sodium Chloride Injection
2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 2)	Experimental	Dosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 6 weeks to 3 months: one dose at the age of 2, 4 and 6 months for basic immunization, one dose at the age of 12~15 months for booster immunization, and the first dose at the earliest age of 6 weeks. Receives: Biological: PCV24 formulation 2; Biological: 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine; Biological: Sodium Chloride Injection

What is being measured

The primary outcome is the main question the study is designed to answer.

2 months ~17 years old incidence of adverse events AE
Measured: At the 30 day after every dose vaccination

Secondary outcomes (6)

Incidence of clinically significant abnormality in laboratory examination tests
12 months ~17 years old:Incidence of clinically significant abnormality in blood routine, blood biochemistry,urine routine and coagulation function test results within 4 days after vaccination
Measured: Day 0 before vaccination and day 4 after vaccination
Incidence of serious adverse events (SAE) and
2 months ~17 years old: incidence of SAEs and AESIs from the first dose of primary immunization to 6 months after full primary immunization.
Measured: 0-6 months after vaccination
Incidence of serious adverse events (SAE)
2 months ~17 years old: incidence of SAEs and AESIs from the first dose of primary immunization to 6 months after full primary immunization.
Measured: 0-6 months after vaccination
Proportion of Pneumococcal serotype-specific IgG antibody concentration ≥0.35 μg/ml (seropositive rate)
Proportion of IgG antibody concentration ≥0.35 μg/ml
Measured: 30 days after vaccination
Proportion of Pneumococcal serotype-specific IgG antibody concentration ≥1.0 μg/ml
Proportion of IgG antibody concentration ≥1.0 μg/ml
Measured: 30 days after vaccination
Pneumococcal serotype-specific IgG antibody geometric mean concentration (GMC) and its growth multiple before immunization
IgG GMC 30 days after vaccination
Measured: 30 days after vaccination

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

27 Apr 202414 Apr 2026

First posted5 Nov 2024
Study start27 Apr 2024
Primary completion10 May 2025
Study completion14 Apr 2026

Resources

Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
Other trials for Pneumococcal Infectious DiseaseStudies of the same condition, open and under way.
What the trial phases meanHow a treatment moves from first tests in people to approval.

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design

Study type: Interventional
Phase: Phase 1
Primary purpose: Prevention
Allocation: Randomised
Intervention model: Parallel groups
Masking: Quadruple blind
Who is masked: Participant, Care provider, Investigator, Outcomes assessor
Enrolment: 230 participants (actual)

IDs, dates and publications

ClinicalTrials.gov ID: NCT06675032
Sponsor's protocol ID: RNCVCT7B001
Status last verified: Dec 2025
First submitted: 4 Nov 2024
Last updated: 17 Aug 2026
Results posted: No
Data monitoring committee: No
FDA-regulated drug: No
FDA-regulated device: No
Individual data sharing: No

Want to know more?

The sponsor has not listed a contact. The official record may have more details.

Talk to your doctor first and take this page with you. Only the study team can confirm whether you can join.

Questions to ask the study team

What is the study trying to find out?
What would I need to do, and how often would I visit?
Could I receive a placebo instead of the treatment?
What are the possible risks and benefits for me?
Will it cost me anything? Are travel or time paid for?
Can I keep seeing my own doctor during the study?
What happens when the study ends?

See locations

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All Pneumococcal Infectious Disease trials

Study at a glance

From the registry record, last updated by the sponsor on 17 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.

Official title: Phase I Clinical Trial Protocol of 24-valent Pneumococcal Polysaccharide Conjugate Vaccine (PCV24) to Evaluate the Safety and Immunogenicity in Children Aged 2 Months (Minimum 6 Weeks) to 17 Years
ClinicalTrials.gov ID: NCT06675032
Acronym / sponsor ID: RNCVCT7B001
Conditions: Pneumococcal Infectious Disease
Phase: Phase 1
Study type: Interventional
Recruitment status: Completed
Enrolment: 230 participants (actual)
Lead sponsor: Reinovax Biologics Co., LTDIndustry (pharma, biotech, devices)
Collaborators: Shaanxi Provincial Center for Disease Control and Prevention
Study start: 27 Apr 2024 (actual)
Primary completion: 10 May 2025 (actual)
Study completion: 14 Apr 2026 (actual)
First posted: 5 Nov 2024 (actual)
Results: Not posted in the source record

Clinical summary

The research question as the sponsor registered it. This describes what the study plans to test, not what it found.

Study design

Primary purpose: Prevention
Allocation: Randomised
Intervention model: Parallel groups
Masking: Quadruple blind (participant, care provider, investigator, outcomes assessor)
Number of arms: 10

Arm	Type	Receives
6~17 years old( PCV24 formulation 1)	Experimental	Biological: PCV24 formulation 1, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose.
6~17 years old(PCV24 formulation 2）	Experimental	Biological: PCV24 formulation 2, Biological: Sodium Chloride InjectionSpecification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose.
24-71 months of age( PCV24 formulation 1)	Experimental	Biological: PCV24 formulation 1, Biological: Sodium Chloride InjectionSpecification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose.
24-71 months of age(PCV24 formulation 2)	Experimental	Biological: PCV24 formulation 2, Biological: Sodium Chloride InjectionSpecification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 24 months of age-17 years of age: 1 dose.
12-23 months of age( PCV24 formulation 1)	Experimental	Biological: PCV24 formulation 1, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 12-23 months age group: 2 doses, at least 2 months apart.
12-23 months of age( PCV24 formulation 2)	Experimental	Biological: PCV24 formulation 2, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 12-23 months age group: 2 doses, at least 2 months apart.
7~11 months of age( PCV24 formulation 1)	Experimental	Biological: PCV24 formulation 1, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 7-11 months age group: 2 doses of primary immunization, with an interval of at least 1 month between the first two doses, and 1 booster dose after 12 months of age.
7~11 months of age(PCV24 formulation 2)	Experimental	Biological: PCV24 formulation 2, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 7-11 months age group: 2 doses of primary immunization, with an interval of at least 1 month between the first two doses, and 1 booster dose after 12 months of age.
2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 1)	Experimental	Biological: PCV24 formulation 1, Biological: 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 6 weeks to 3 months: one dose at the age of 2, 4 and 6 months for basic immunization, one dose at the age of 12~15 months for booster immunization, and the first dose at the earliest age of 6 weeks.
2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 2)	Experimental	Biological: PCV24 formulation 2, Biological: 13-Valent Pneumococcal Polysaccharide Conjugate Vaccine, Biological: Sodium Chloride InjectionDosage form: injection Specification: 0.5 ml/piece Dosage: The preferred part for infants is the anterolateral thigh (vastus lateralis), and the deltoid muscle of the upper arm for toddlers and children, with a dose of 0.5 ml per 1 human use. Duration of medication: 6 weeks to 3 months: one dose at the age of 2, 4 and 6 months for basic immunization, one dose at the age of 12~15 months for booster immunization, and the first dose at the earliest age of 6 weeks.

Who may qualify

Ages: 6 weeks to 17 years
Sex: All
Healthy volunteers: Accepted
Age groups: Child

Key inclusion criteria (6 listed)

Healthy subjects aged 2~3 months (minimum 6 weeks old) and 7 months old~17 years old, and the guardian of the subject can provide valid identification of the subject and the guardian of the subject.
Subjects and/or their guardians voluntarily consent to the subjects to participate in this study and sign the informed consent form.
Subjects and/or their guardians have the ability to understand (non-illiterate) study procedures.
Female subjects and male subjects of childbearing age agree to use effective contraceptive measures within 6 months from the start of the study to the date of immunization.
Those who have completed the full course of primary immunization in accordance with the requirements of this clinical trial, and the age before the booster immunization is 12~15 months old, (the interval between the booster immunization time and the last dose of primary immunization is at least 2 months).

Key exclusion criteria (44 listed)

Individuals who have previously received any type of pneumococcal vaccine or have a history of invasive disease caused by Streptococcus pneumoniae (confirmed by clinical, serological, or microbiological methods).
Abnormal results from physical examinations or laboratory tests that are deemed clinically significant by a clinician.
Individuals suspected or diagnosed with fever (axillary temperature ≥37.5℃) within 3 days prior to enrollment; or axillary temperature ≥37.3℃ (for those over 14 years old) or ≥37.5℃ (for those 14 years old or younger) on the day of the first vaccine dose.
Within 7 days prior to the first dose of vaccination, there is a history of acute illness or acute exacerbation of chronic disease, and systemic application of antibiotics and antiviral medications has been administered; within 3 days prior to the first dose of vaccination, antipyretics, analgesics, and antihistamines (such as acetaminophen, ibuprofen, aspirin, loratadine, cetirizine, etc.) have been taken.
A history of severe allergy to any component of the vaccine being tested, or a history of severe allergy to any vaccine containing tetanus toxoid, or a previous history of severe allergy to any vaccine or medication (including but not limited to: anaphylactic shock, allergic laryngeal edema, allergic purpura, thrombocytopenic purpura, local allergic necrotic reactions, difficulty breathing, angioedema, etc.); or a previous history of severe adverse reactions after the use of any vaccine or medication.

Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.

Interventions

Intervention	Type	Arms
PCV24 formulation 1Also: 24-Valent Pneumococcal Polysaccharide Conjugate Vaccine24-Valent Pneumococcal Polysaccharide Conjugate Vaccine formulation 1：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose. Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.	Biological	12-23 months of age( PCV24 formulation 1), 24-71 months of age( PCV24 formulation 1), 2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 1), 6~17 years old( PCV24 formulation 1), 7~11 months of age( PCV24 formulation 1)
PCV24 formulation 2Also: 24-Valent Pneumococcal Polysaccharide Conjugate Vaccine24-Valent Pneumococcal Polysaccharide Conjugate Vaccine formulation 2：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose. Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.	Biological	12-23 months of age( PCV24 formulation 2), 24-71 months of age(PCV24 formulation 2), 2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 2), 6~17 years old(PCV24 formulation 2）, 7~11 months of age(PCV24 formulation 2)
13-Valent Pneumococcal Polysaccharide Conjugate VaccineAlso: Prevenar13®13-Valent Pneumococcal Polysaccharide Conjugate Vaccine:Dosage form: Injection Specification:0.5 mL/strip Dosage: The preferred site for infants is the anterolateral thigh (lateral femoral muscle), and for toddlers and children, the deltoid muscle of the upper arm. Dosing schedule:6 weeks months: 4 doses, one dose each of basic immunization at 2, 4, and 6 months of age, and one dose of booster immunization at 12-15 months of age, with the earliest of the first dose being given at 6 weeks of age. The first dose should be given at 6 weeks of age at the earliest.	Biological	2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 1), 2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 2)
Sodium Chloride InjectionSodium Chloride Injection：Dosage form: Injection Specification:0.5 ml/strip Dosage: The preferred site is the anterolateral thigh (lateral femoral muscle) in infants and the deltoid muscle of the upper arm in infants and children. The preferred dosage for infants is 0.5 ml per dose. Dosing schedule:24 months old-17 years old group: 1 dose.12-23 months old group: 2 doses, each dose at least 2 months apart.7-11 months old group: 2 doses of basic immunization, the first two doses at least 1 month apart, and a booster dose after 12 months of age.6 weeks months: 1 dose of basic immunization at each of the ages of 2, 4, and 6 months, and 1 dose of booster immunization at the age of 12-15 months, with the earliest of the first dose at the age of 6 weeks. The first dose is given at 6 weeks of age at the earliest.	Biological	12-23 months of age( PCV24 formulation 1), 12-23 months of age( PCV24 formulation 2), 24-71 months of age( PCV24 formulation 1), 24-71 months of age(PCV24 formulation 2), 2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 1), 2~3 months old (minimum) (6 weeks of age)( PCV24 formulation 2), 6~17 years old( PCV24 formulation 1), 6~17 years old(PCV24 formulation 2）, 7~11 months of age( PCV24 formulation 1), 7~11 months of age(PCV24 formulation 2)

Primary outcome

2 months ~17 years old incidence of adverse events AE
Time frame: At the 30 day after every dose vaccination

6 secondary outcomes

Incidence of clinically significant abnormality in laboratory examination tests
Time frame: Day 0 before vaccination and day 4 after vaccination
Incidence of serious adverse events (SAE) and
Time frame: 0-6 months after vaccination
Incidence of serious adverse events (SAE)
Time frame: 0-6 months after vaccination
Proportion of Pneumococcal serotype-specific IgG antibody concentration ≥0.35 μg/ml (seropositive rate)
Time frame: 30 days after vaccination
Proportion of Pneumococcal serotype-specific IgG antibody concentration ≥1.0 μg/ml
Time frame: 30 days after vaccination
Pneumococcal serotype-specific IgG antibody geometric mean concentration (GMC) and its growth multiple before immunization
Time frame: 30 days after vaccination

Results and safety

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

Research links

Official record on ClinicalTrials.govLast updated by the sponsor 17 Aug 2026.
Individual participant dataSharing planned: No

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Referral and contact

AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.

Yunong Zhang, Master principal investigator

Shanxi Province Center for Disease Control and Prevention

1 site in 1 country: see every site and its status.

Questions about this trial

What is this clinical trial studying?

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 44 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 17 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

2 months ~17 years old incidence of adverse events AE (time frame: At the 30 day after every dose vaccination). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06675032.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Aug 2026.