New quadrivalent flu vaccine shows promise for little ones
NCT ID NCT04381689
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This phase 3 study tests a new quadrivalent seasonal influenza vaccine in healthy infants aged 6 months to under 3 years. The goal is to see if the vaccine triggers a strong immune response and is safe compared to an existing flu shot. About 245 children will take part, and researchers will measure antibody levels before and after vaccination.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
quadrivalent seasonal influenza vaccine
What this could lead to
If successful, this could provide a safe and effective seasonal flu vaccine option for infants and toddlers.
What could go wrong
This is a mid-stage trial with 245 participants, so results may not apply to all children. The vaccine may not work as well as expected or could cause side effects like mild fever or soreness.
Disclaimer
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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.
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.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
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Contacts and locations
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Locations
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Korea University ANSAN Hospital
Ansan-si, Gyeonnggi-do, 15355, South Korea
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The Catholic University of Korea, Bucheon St. Mary's Hospital
Bucheon-si, Gyeonnggi-do, 15355, South Korea