Stanford study: does COVID-19 weaken flu shot protection?
NCT ID NCT04579588
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how well the flu vaccine works in people who have had COVID-19, including those with long-term symptoms like fatigue or diabetes. Researchers will compare immune responses between 230 adults and children (ages 9-64) who had COVID-19 and those who did not. The goal is to understand if past COVID-19 infection changes how the body responds to the flu vaccine over time.
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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
Locations
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Stanford University
RECRUITINGPalo Alto, California, 94304, United States
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