New 21-Valent vaccine aims to protect kids against pneumococcal disease

NCT ID NCT06838000

First seen Nov 01, 2025 · Last updated Apr 26, 2026 · Updated 30 times

Summary

This study tests a new 21-valent pneumococcal vaccine (PCV21) in healthy infants, toddlers, children, and adolescents who need catch-up vaccination. The goal is to see if PCV21 is safe and triggers a strong immune response compared to an existing 20-valent vaccine. About 1,268 participants aged 7 months to 17 years will receive the vaccine and be monitored for side effects and antibody levels.

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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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Contacts and locations

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

Conditions

Explore the condition pages connected to this study.