Plain-English translation of NCT06968442 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This study doesn't follow the usual testing phases — it may be an observational study or a different type of research.
Researchers want to understand why people with obesity sometimes have more severe COVID-19 infections. This study will compare blood samples from people with obesity who are scheduled for weight-loss surgery and healthy hospital workers without obesity. By studying how immune cells in the blood respond differently between these two groups, scientists hope to learn more about what makes COVID-19 more dangerous for some people.
People with obesity have been shown to have worse outcomes from COVID-19, but doctors don't fully understand why. This research aims to uncover the biological differences in immune system responses that might explain this connection.
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Your participation involves a single visit where you will donate one blood sample (about 40 milliliters, or roughly 3 tablespoons) after fasting for 8 hours. The blood draw takes just a few minutes. Your blood sample will then be sent to a research laboratory in Amsterdam where scientists will study your immune cells in detail. This is a one-time commitment with no ongoing visits or follow-up required.
AI-generated summary from trial data · Jun 2, 2026 · Not medical advice
Netherlands
Enrollment target
~60 participants
Started
April 2025
Primary completion
December 2025
This trial's estimated completion date has passed — the record may not be fully up to date.
Age range
18 Years – 65 Years
Last updated on clinicaltrials.gov in May 2025.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Willem A Mak, M.Sc.
Franciscus Hospital
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.