Study of the Safety of a 21-valent Pneumococcal Conjugate Vaccine in Healthy Infants From Approximately 2 Months of Age

Running, not enrolling · Phase 3

Conditions studied: Pneumococcal Immunization

In brief

This study is a Phase 3, randomized, modified double-blind study which aims to document the safety profile of the PCV21 vaccine (investigational pneumococcal vaccine) compared to a licensed 20-valent pneumococcal conjugate vaccine in infants aged from approximately 2 months (42 to 89 days). The study duration per participant will be up to approximately 19 months. The study vaccines (either PCV21 or 20vPCV) will be administered at approximately 2, 4, 6 and 12 to 15 months of age. Routine pediatric vaccines will be given as per local recommendations. There will be 6 study visits: Visit (V)01, V02 separated from V01 by 60 days, V03 separated from V02 by 60 days, V04 separated from V03 by 30 days, V05 at 12 months of age until 15 months of age, V06 separated from V05 by 30 days.

Key facts

Study ID

NCT06824194

Run by

Sanofi

People needed

2360

Starts

2025-02-18

Expected to finish

2027-10-22

Last updated by the study team

2026-04-13

Who can join

Age: 0 and older, up to 0. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Aged 42 to 89 days on the day of inclusion
• Participants who are healthy as determined by medical evaluation including medical history and physical examination
• Born at full term of pregnancy (≥ 37 weeks) and with a birth weight ≥ 2.5 kg or born after a gestation period above 28 (> 28 weeks) through 36 weeks with a birth weight ≥ 1.5 kg, and in both cases medically stable as assessed by the investigator

You may not qualify if…

• Participants are excluded from the study if any of the following criteria apply:
• Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy; or long-term systemic corticosteroid therapy
• History of microbiologically confirmed Streptococcus pneumoniae infection or disease
• Any contraindication to the routine pediatric vaccine being administered in the study
• History of seizure or significant stable or progressive neurologic disorders such as infantile spasms, inflammatory nervous system diseases, encephalopathy, cerebral palsy
• Known systemic hypersensitivity to any of the study interventions components, or history of a life-threatening reaction to the study interventions used in the study or to a product containing any of the same substances
• Laboratory-confirmed or known thrombocytopenia, as reported by the parent(s) / legal acceptable representative (LAR(s)), contraindicating intramuscular (IM) injection
• Bleeding disorder, or receipt of anticoagulants in the 3 weeks preceding inclusion, contraindicating IM injection
• Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
• Moderate or severe acute illness/infection (according to investigator judgment) or febrile illness (temperature ≥ 38.0°C [≥ 100.4°F]) on the day of study intervention administration. A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided
• Receipt of any non-US Food and Drug Administration (FDA) approved vaccine in the 4 weeks preceding the study intervention administration or planned receipt of any non-US FDA approved vaccine in the 4 weeks following the study intervention administration, including monovalent pandemic influenza vaccines and multivalent influenza vaccines, as applicable per local recommendations.
• Receipt of any Bacillus of Calmette and Guerin (BCG) vaccine within 4 weeks preceding the first study intervention administration or planned receipt any BCG vaccine within the study period
• Previous vaccination against S. pneumoniae
• Previous vaccination against the following antigens: diphtheria, tetanus, pertussis, H. influenzae type b, poliovirus
• Receipt of more than 1 dose of hepatitis B vaccine
• Receipt of immune globulins, blood or blood-derived products since birth
• Participation at the time of study enrollment (or in the 6 weeks preceding the first study intervention administration) or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure
• Note: The above information is not intended to contain all considerations relevant to a potential participation in a clinical trial.

Where it is running

• University of Alabama at Birmingham- Site Number : 8400130 — Birmingham, Alabama, United States
• Lakeview Clinical Research- Site Number : 8400054 — Guntersville, Alabama, United States
• Midway Medical Clinic- Site Number : 8400091 — Oneonta, Alabama, United States
• Noble Clinical Research- Site Number : 8400121 — Tucson, Arizona, United States
• The Children's Clinic- Site Number : 8400079 — Jonesboro, Arkansas, United States
• Helios CR, Inc. - Little Rock- Site Number : 8400090 — Sherwood, Arkansas, United States
• Helping Hands Healthcare Group - Fullerton- Site Number : 8400063 — Fullerton, California, United States
• Advanced Investigative Medicine- Site Number : 8400055 — Hawthorne, California, United States
• Century Research Institute- Site Number : 8400118 — Huntington Park, California, United States
• Matrix Clinical Research - Huntington Park- Site Number : 8400117 — Huntington Park, California, United States
• Matrix Clinical Research - Los Angeles- Site Number : 8400026 — Los Angeles, California, United States
• Matrix Clinical Research - Los Angeles- Site Number : 8400123 — Los Angeles, California, United States
• Alliance Research Institute - Lynwood- Site Number : 8400099 — Lynwood, California, United States
• Madera Family Medical Group- Site Number : 8400011 — Madera, California, United States
• FOMAT-Golden Valley Health Centers- Site Number : 8400084 — Merced, California, United States
• Stanford University Medical Center CTRU - 800 Welch Road- Site Number : 8400072 — Palo Alto, California, United States
• Center for Clinical Trials - Paramount- Site Number : 8400100 — Paramount, California, United States
• Integrated Clinical Research LLC- Site Number : 8400027 — Sherman Oaks, California, United States
• Emanate Health - Queen of the Valley Hospital- Site Number : 8400105 — West Covina, California, United States
• All In One Clinic- Site Number : 8400127 — Whittier, California, United States
• Amicis Research Center-Winnetka- Site Number : 8400128 — Winnetka, California, United States
• Emerson Clinical Research Institute - Washington - Connecticut Avenue- Site Number : 8400102 — Washington D.C., District of Columbia, United States
• D&H Doral Research Center- Site Number : 8400095 — Doral, Florida, United States
• Dolphin Medical Research, LLC- Site Number : 8400120 — Doral, Florida, United States
• Alabama Clinical Therapeutics - Birmingham - St. Vincent's Drive- Site Number : 8400013 — Birmingham, Alabama, United States

Full record on ClinicalTrials.gov

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