Supercharged flu shot boosts immunity in seniors, study finds
NCT ID NCT04498832
First seen Nov 01, 2025 · Last updated Jun 16, 2026 · Updated 32 times
Summary
This study tested whether a high-dose flu vaccine could create a stronger immune response than the standard dose in adults aged 60 and older. Over 2,100 healthy seniors in Japan received either the high-dose or standard-dose vaccine. Results showed that the high-dose shot triggered a significantly stronger antibody response against all four flu strains included in the vaccine.
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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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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
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.