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What happens to the immune system after COVID-19? a major study aims to find out.

NCT ID NCT04362150

Recruiting now Knowledge-focused Sponsor: University of California, San Francisco Source: ClinicalTrials.gov ↗

First seen Jul 23, 2026 · Last updated Jul 24, 2026 · Updated 1 time

Summary

This study follows 800 adults who have recovered from COVID-19 to understand how their immune systems respond over the long term. By collecting blood samples and health data, researchers hope to uncover why some people develop lingering symptoms, known as Long COVID. The goal is to build a detailed picture of the body's immune memory and identify factors that influence recovery.

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
Could help identify why some people develop Long COVID and point toward ways to prevent or treat it.
What could go wrong
This is an observational study, not a treatment trial, so it won't directly test any therapy. Findings may take years to translate into clinical practice.

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.

Coronavinae infectious disease COVID-19 long COVID-19

As listed by the trial registrant

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

COVID

Contacts and locations

Study contacts

  • Contact

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

  • Contact

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

Locations

  • Zuckerberg San Francisco General Hospital (ZSFG)

    RECRUITING

    San Francisco, California, 94110, United States

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

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

    Contact

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