Scientists track immune battles against flu and COVID-19

NCT ID NCT06848309

Recruiting now Knowledge-focused Sponsor: Washington University School of Medicine Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tracks the immune response of 300 people with confirmed flu or COVID-19, comparing those who were recently vaccinated to those who were not. Participants provide blood, saliva, and nasal samples over 6 months, and some may opt for a lung fluid sample via bronchoscopy. The goal is to understand how antibodies and immune cells change over time after infection.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this research could improve understanding of how the immune system fights flu and COVID-19, potentially guiding future vaccine or treatment strategies.
What could go wrong: This is an observational study, not testing a new treatment. It will not directly benefit participants and may not lead to immediate medical advances.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

COVID-19 Infections influenza

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

IMMUNE RESPONSE OF HOST INFLUENZA SARS-COV-2 (COVID-19) INFECTION

Contacts and locations

Locations

Washington University in Saint Louis Department of Emergency Medicine, Emergency Care Research Core
RECRUITING

St Louis, Missouri, 63110, United States

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