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Pneumococcal Vaccine Polyvalent-Pneumovax 23

Phase 2

Pneumococcal Immunization | Monoclonal antibody | Infectious Disease |Sanofi|Last Updated: Sep 8, 2025

Success Probability

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment750

FDA Designations

No designations recorded

Clinical trial landscape

Pneumococcal Vaccine Polyvalent-Pneumovax 23 · 1 trial · 1 indication

Phase 2 1
NCT04583618Study of a Pneumococcal Conjugate Vaccine in Adults Aged 50 to 84 Years.Pneumococcal Immunization
COMPLETED750 Analytics
PHASE2COMPLETED
Study of a Pneumococcal Conjugate Vaccine in Adults Aged 50 to 84 Years.
Pneumococcal ImmunizationUnlock trial analytics

Study Endpoints

Primary Endpoints

Geometric Mean Titers (GMTs) of Pneumococcal Serotypes Using Serotype-Specific MOPA
Post-vaccination at Day 31

The GMs for serotype specific OPA titers were measured using MOPA which was used to evaluate the opsonophagocytic index (50% killing) of pneumococcal anti-capsular polysaccharide antibodies in human serum samples following vaccination. Titers were expressed in terms of 1/dilution.

Geometric Mean Titers Ratio of Pneumococcal Serotypes Using Serotype-Specific MOPA
Pre-vaccination at Baseline (Day 1) and Post-vaccination at Day 31

The GMs for serotype specific OPA titers were measured using MOPA which was used to evaluate the opsonophagocytic index (50% killing) of pneumococcal anti-capsular polysaccharide antibodies in human serum samples following vaccination. Ratio was calculated as post-vaccination titer at Day 31 to pre-vaccination titer at Day 1.

Geometric Mean Concentrations (GMCs) of Pneumococcal Serotypes Using Serotype-Specific IgG ECL
Post-vaccination at Day 31

The GMCs for serotype specific pneumococcal IgG antibodies were measured using ECL, a multiplexed serological assay which allowed for the simultaneous quantification of human IgG against pneumococcal polysaccharide antigens.

Geometric Mean Concentrations Ratio of Pneumococcal Serotypes Using Serotype-Specific IgG ECL
Pre-vaccination at Baseline (Day 1) and Post-vaccination at Day 31

The GMCs for serotype specific pneumococcal IgG antibodies were measured using ECL, a multiplexed serological assay which allowed for the simultaneous quantification of human IgG against pneumococcal polysaccharide antigens. Ratio was calculated as post-vaccination titer at Day 31 to pre-vaccination titer at Day 1.

Number of Participants With Immediate Unsolicited Systemic Adverse Events (AEs)
Within 30 minutes post-vaccination

An unsolicited AE was an observed AE that did not fulfill the conditions of solicited reactions, i.e., pre-listed in the CRF in terms of diagnosis and/or onset window post-vaccination. Systemic AEs were all AEs that were not injection or administration site reactions.

Number of Participants With Solicited Injection Site Reactions
Up to 7 Days post-vaccination (Day 8)

A solicited reaction was an "expected" adverse reaction (AR) (sign or symptom) observed and reported under the conditions (nature and onset) pre-listed in the protocol and CRF. An injection site reaction was an AR at and around the injection site. Solicited injection site reactions included injection site pain, injection site erythema and injection site swelling.

Number of Participants With Solicited Systemic Reactions
Up to 7 Days post-vaccination (Day 8)

A solicited reaction was an "expected" AR (sign or symptom) observed and reported under the conditions (nature and onset) pre-listed in the protocol and CRF. Solicited systemic reactions included fever, headache, malaise, myalgia, arthralgia and shivering.

Number of Participants With Unsolicited AEs
Within 30 days post-vaccination

An unsolicited AE was an observed AE that did not fulfill the conditions of solicited reactions, i.e., pre-listed in the CRF in terms of diagnosis and/or onset window post-vaccination.

Number of Participants With Serious Adverse Events (SAEs) and Adverse Event of Special Interest (AESIs)
From the study vaccine administration (Day 1) until the end of 6-Month follow-up, 181 days

An SAE was any untoward medical occurrence that at any dose resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, or was an important medical event. An AESI was defined as one of scientific and medical concern specific to the Sponsor's study intervention or program, for which ongoing monitoring and rapid communication by the investigator to the Sponsor could be appropriate. AESI included analyphylaxis.

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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
SP0202-IIbEXPERIMENTALOne dose at Day 1
SP0202-VIEXPERIMENTALOne dose at Day 1
SP0202-VIIEXPERIMENTALOne dose at Day 1
Prevnar 13ACTIVE_COMPARATOROne dose at Day 1
Pneumovax 23ACTIVE_COMPARATOROne dose at Day 1

Interventions

NameTypeDescription
Pneumococcal Conjugate Vaccine - formulation 1-SP0202-IIbBIOLOGICALPharmaceutical form:Suspension for injection Route of administration: intramuscular
Pneumococcal Conjugate Vaccine - formulation 2-SP0202-VIBIOLOGICALPharmaceutical form:Suspension for injection Route of administration: intramuscular
Pneumococcal Conjugate Vaccine - formulation 3-SP0202-VIIBIOLOGICALPharmaceutical form:Suspension for injection Route of administration: intramuscular
Pneumococcal 13 - valent conjugate vaccine-Prevnar 13BIOLOGICALPharmaceutical form:Suspension for injection Route of administration: intramuscular
Pneumococcal Vaccine Polyvalent-Pneumovax 23BIOLOGICALPharmaceutical form:Solution for injection Route of administration: intramuscular
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Eligibility Criteria

Age Range50 Years to 84 Years
SexALL
Healthy VolunteersYes
Study Sites17

Inclusion criteria : \- Aged 50 to 84 years on the day of inclusion . Exclusion criteria: * Participant was pregnant, or lactating, or of childbearing potential and was not using an effective method of contraception or abstinence from at least 4 weeks prior to vaccination until at least 4 weeks a...

Countries:United States
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Frequently asked questions about Pneumococcal Vaccine Polyvalent-Pneumovax 23

What is Pneumococcal Vaccine Polyvalent-Pneumovax 23 used for?

Pneumococcal Vaccine Polyvalent-Pneumovax 23 is used for pneumococcal immunization, which helps protect against infections caused by Streptococcus pneumoniae bacteria. It is being studied in adults aged 50 to 84 years. The vaccine is currently in Phase 2 clinical development and is not yet approved for use.

Who makes Pneumococcal Vaccine Polyvalent-Pneumovax 23?

Pneumococcal Vaccine Polyvalent-Pneumovax 23 is being developed by Sanofi, a global biopharmaceutical company. Sanofi is listed on the stock exchange under the ticker symbol SNY. The company is conducting clinical trials to evaluate the vaccine's safety and efficacy for pneumococcal immunization.

What phase is Pneumococcal Vaccine Polyvalent-Pneumovax 23 in?

Pneumococcal Vaccine Polyvalent-Pneumovax 23 is currently in Phase 2 clinical development. It is an investigational vaccine and has not yet received regulatory approval. One Phase 2 trial has been completed, involving 750 participants, to assess its use for pneumococcal immunization in adults aged 50 to 84 years.

What clinical trials is Pneumococcal Vaccine Polyvalent-Pneumovax 23 in?

Pneumococcal Vaccine Polyvalent-Pneumovax 23 has one completed clinical trial registered under NCT04583618. This Phase 2 study, titled 'Study of a Pneumococcal Conjugate Vaccine in Adults Aged 50 to 84 Years,' enrolled 750 participants in the United States. The trial was randomized, double-blind, and active-controlled, and it included healthy volunteers.

Is Pneumococcal Vaccine Polyvalent-Pneumovax 23 FDA approved?

Pneumococcal Vaccine Polyvalent-Pneumovax 23 is not FDA approved. It is an investigational vaccine currently in Phase 2 clinical development. The vaccine is being studied for pneumococcal immunization, but it has not yet completed the clinical trials and regulatory review process required for approval.