Blood samples from kids and seniors could shape next Year's flu vaccine
NCT ID NCT04551677
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This study collected blood samples from 90 healthy children (6 months to under 9 years) and adults aged 65 and older who received the 2020-2021 flu vaccine. The samples were sent to experts at the WHO, CDC, and FDA to help decide which flu strains to include in future vaccines. The goal was not to test the vaccine itself, but to gather data to improve vaccine recommendations.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Fluzone Quadrivalent and Fluzone High-Dose Quadrivalent influenza vaccines
What this could lead to
If successful, the data could help health experts choose the right flu strains for future vaccines, making them more effective.
What could go wrong
This is a small, completed sample-collection study, not a test of vaccine effectiveness. The results may not directly lead to better vaccines.
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.
Contacts and locations
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Locations
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Investigational Site Number 8400001
Bardstown, Kentucky, 40004, United States
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Investigational Site Number 8400002
Salt Lake City, Utah, 84121, United States