New vaccine aims to protect kids from pneumonia – study underway

NCT ID NCT06838000

Ongoing ⭐️ VACCINE ⭐️ Sponsor: Sanofi Pasteur, a Sanofi Company Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests a new 21-valent pneumococcal vaccine (PCV21) in healthy infants, toddlers, children, and adolescents who need catch-up vaccination. Around 1,268 participants will receive either PCV21 or the current 20-valent vaccine. Researchers will monitor side effects and measure immune responses to see if PCV21 is safe and effective.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

21-valent pneumococcal conjugate vaccine (PCV21)

What this could lead to

If successful, this vaccine could provide better protection against pneumococcal infections for children who missed earlier doses, potentially reducing serious illnesses like pneumonia and meningitis.

What could go wrong

This is a phase 3 trial, but it focuses on immune response and safety, not direct disease prevention. The vaccine may not prove more effective than existing ones, and side effects like injection site reactions or fever are possible.

Disclaimer Read more

This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Conditions

The condition(s) this trial relates to.

pneumococcal infection prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

PNEUMOCOCCAL INFECTIONS

Contacts and locations

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Locations

Site # 2330001

Paide, Järvamaa, 72713, Estonia
Site # 2330002

Tallinn, Harju, EE-10617, Estonia
Site # 2330003

Tallinn, Harju, EE-10617, Estonia
Site # 2330004

Tartu, 50708, Estonia
Site # 2330005

Tartu, Tartu, 50106, Estonia
Site # 2330006

Tallinn, Harju, 10117, Estonia
Site # 2330007

Tallinn, Harju, 13619, Estonia
Site # 6160001

Torun, 87-100, Poland
Site # 6160002

Bydgoszcz, 85-048, Poland
Site # 6160003

Częstochowa, Silesian Voivodeship, 42-200, Poland
Site # 6160004

Bydgoszcz, 85-796, Poland
Site # 6160006

Kłodzko, 57-300, Poland
Site # 6160007

Warsaw, Masovian Voivodeship, 03-291, Poland
Site # 6160009

Lodz, Lodskie, 91-341, Poland
Site # 7640001

Pathum Thani, Thailand
Site # 7640002

Hat Yai, Changwat Songkhla, 90112, Thailand
Site # 7640003

Mueang Nonthaburi, Chiang Mai, 50200, Thailand
Site # 7640004

Chiang Mai, 50200, Thailand
Site # 7640006

Bangkok, 10400, Thailand
Site # 7640007

Bangkok, 10400, Thailand
Site # 7640008

Bangkok, 10270, Thailand
Site # 8400001

Houston, Texas, 77065, United States
Site # 8400002

Omaha, Nebraska, 68114, United States
Site # 8400003

Sioux City, Iowa, 51106, United States
Site # 8400004

Union City, Georgia, 30291, United States
Site # 8400007

Hialeah, Florida, 33012, United States
Site # 8400008

Paramount, California, 90723, United States
Site # 8400009

Miami, Florida, 33166, United States
Site # 8400012

Ridgeland, Mississippi, 39531, United States
Site # 8400014

Melbourne, Florida, 32934, United States
Site # 8400016

Miami, Florida, 33166, United States
Site # 8400017

Stephenville, Texas, 76401, United States
Site # 8400018

Biloxi, Mississippi, 39531, United States
Site # 8400021

Fayetteville, Georgia, 30214, United States
Site # 8400023

Erlanger, Kentucky, 41018, United States
Site # 8400024

Doral, Florida, 33166, United States
Site # 8400025

Rochester, New York, 14642, United States
Site #8400010

Binghamton, New York, 13905, United States