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Completed Phase 2 Interventional Accepts healthy volunteers Results available

Trial To Evaluate The Safety, Tolerability, And Immunogenicity Of A Multivalent Group B Streptococcus Vaccine In Healthy Nonpregnant Women And Pregnant Women And Their Infants

ClinicalTrials.gov ID: NCT03765073

Public ClinicalTrials.gov record NCT03765073. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 30, 2026, 4:01 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A PHASE 1/2, RANDOMIZED, PLACEBO-CONTROLLED, OBSERVER-BLINDED TRIAL TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A MULTIVALENT GROUP B STREPTOCOCCUS VACCINE IN HEALTHY NONPREGNANT WOMEN AND PREGNANT WOMEN 18 TO 40 YEARS OF AGE AND THEIR INFANTS

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

Phase 1/2, randomized, placebo-controlled, observer-blinded study will evaluate the safety, tolerability and immunogenicity of the investigational multivalent group B streptococcus vaccine administered at one dose level (various formulations) in healthy nonpregnant women (various formulations at one dose level), and then in healthy pregnant women (various formulations at three dose levels), and finally in healthy pregnant women at a selected dose level/formulation.

Study identification

NCT ID
NCT03765073
Recruitment status
Completed
Study type
Interventional
Phase
Phase 2
Lead sponsor
Pfizer
Industry
Enrollment
1,208 participants

Conditions and interventions

Eligibility (public fields only)

Age range
0 Years to 40 Years
Sex
All
Healthy volunteers
Accepts healthy volunteers

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Jan 14, 2019 (Actual)
Primary completion
Mar 4, 2024 (Actual)
Completion
Mar 4, 2024 (Actual)
Last update posted
Aug 5, 2025

2019 – 2024

United States locations

U.S. sites
26
U.S. states
10
U.S. cities
14
Facility City State ZIP Site status
Velocity Clinical Research Mobile Alabama 36608 —
Velocity Clinical Research, Phoenix Phoenix Arizona 85006 —
Chemidox Clinical Trials Inc. Lancaster California 93534 —
Chemidox Clinical Trials Inc Lancaster California 93534 —
Emerson Clinical Research Institute Washington D.C. District of Columbia 20009 —
Clinical Research Prime Idaho Falls Idaho 83404 —
Clinical Research Prime Rexburg Rexburg Idaho 83440 —
Lakeview Regional Medical Center Covington Louisiana 70433 —
MedPharmics Covington Louisiana 70433 —
St. Tammany Parish Hospital Covington Louisiana 70433 —
North Oaks Medical Center Hammond Louisiana 70403 —
North Oaks Obstetrics & Gynecology Hammond Louisiana 70403 —
Velocity Clinical Research Slidell Louisiana 70458 —
Boeson Research Missoula Montana 59804 —
Community Hospital Missoula Montana 59804 —
The Birth Center Missoula Montana 59804 —
Meridian Clinical Research Hastings Nebraska 68901 —
Frontier Pediatric Care (Follow-Up Visits for Infant Participants) Lincoln Nebraska 68506 —
Bryan Women's Care Physicians (Maternal Visits & Obstetric Exams) Lincoln Nebraska 68510 —
Be Well Clinical Studies Lincoln Nebraska 68516 —
Lowcountry Women's Specialists Summerville South Carolina 29485 —
Summerville Medical Center Summerville South Carolina 29485 —
Coastal Pediatric Research Summerville South Carolina 29486 —
Sentara Leigh Hospital Norfolk Virginia 23502 —
The Group for Women Norfolk Virginia 23502 —
Tidewater Physicians for Women Norfolk Virginia 23502 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 9 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03765073, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Aug 5, 2025 · Synced Oct 30, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT03765073 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →