New blood test may uncover immune system clues in long COVID and lyme

NCT ID NCT06731179

First seen Jan 08, 2026 · Last updated May 14, 2026 · Updated 16 times

Summary

This study is for people with Long COVID, Lyme disease, or Chronic Fatigue Syndrome (ME/CFS) who have had symptoms for at least 6 months. Researchers will use a special blood test to check if T cells (a part of the immune system) are not working properly. Participants give a blood sample and fill out a symptom questionnaire at the start and again 6 months later. The goal is to learn more about these conditions, not to test a treatment.

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Contacts and locations

Locations

  • Glasgow and Clyde NHS

    Glasgow, United Kingdom

  • Monklands University Hospital, NHS

    Airdrie, United Kingdom

  • Raigmore Hospital, Inverness

    Inverness, United Kingdom

Conditions

Explore the condition pages connected to this study.