Supercharged flu shot boosts protection for seniors
NCT ID NCT04498832
First seen Nov 01, 2025 · Last updated Apr 29, 2026 · Updated 25 times
Summary
This study tested whether a high-dose flu vaccine works better than the standard-dose shot in adults aged 60 and older. About 2,100 healthy older adults in Japan took part. Researchers measured immune responses 28 days after vaccination to see if the high-dose version triggered stronger protection against four flu strains.
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This is a summary of
the original study
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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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Contacts and locations
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Locations
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Investigational Site Number 3920001
Osaka, Japan
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Investigational Site Number 3920002
Suita-Shi, Japan
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Investigational Site Number 3920003
Shinjuku-Ku, Japan
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Investigational Site Number 3920004
Koganeishi, Japan
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Investigational Site Number 3920005
Fukuoka, Japan
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Investigational Site Number 3920006
Kumamoto, Japan
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Investigational Site Number 3920007
Toshima-Ku, Japan
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Investigational Site Number 3920008
Shinjuku-Ku, Japan
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Investigational Site Number 3920009
Shinjuku-Ku, Japan
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Investigational Site Number 3920010
Yokohama, Japan
Conditions
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