Stanford study: does COVID-19 weaken flu shot protection?

NCT ID NCT04579588

First seen Oct 31, 2025 · Last updated May 13, 2026 · Updated 21 times

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 measure immune responses over time in 230 adults and children (ages 9-64) and compare them to people who never had COVID-19. The goal is to understand if COVID-19 affects long-term flu immunity.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Stanford University

    RECRUITING

    Palo Alto, California, 94304, United States

    Contact Phone: •••-•••-•••• Email: •••••@•••••

Conditions

Explore the condition pages connected to this study.