Your flu shot could help design next Year's vaccine
NCT ID NCT04109222
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This study collected blood samples from 90 children (6 months to under 9 years) and adults 65 and older after they received the 2019-2020 flu vaccine. The samples were sent to health agencies like the WHO and CDC to help them decide which flu strains to include in future vaccines. The study did not test a new treatment or cure, but aimed 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 influenza vaccines
What this could lead to
If successful, this study could help health experts choose the right flu vaccine formula for future seasons, potentially making flu shots 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 improve vaccines or protect against flu.
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
Salt Lake City, Utah, 84121, United States
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Investigational Site Number 8400002
Bardstown, Kentucky, 40004, United States