Clinical trial Recruiting at 1 site Interventional Ages 18 to 65

Investigating how obesity affects severe COVID-19

Official title: SARS-CoV-2 Antibody-mediated Inflammatory Responses by Macrophages in Individuals With and Without Obesity

Run by Franciscus Gasthuis · NCT06968442 · Data updated 2026-11-12

This study is trying to see how obesity affects the immune response and severity of COVID-19 by comparing blood samples from obese patients and non-obese healthcare workers.

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment60 (estimated)
SponsorFranciscus Gasthuis
Academic / other
Locations1 site (Rotterdam, South Holland)
StatusRecruiting
StartedApril 22, 2025
Main results expectedDecember 31, 2025
Study endsApril 22, 2026
Registry record updatedMay 16, 2025
Trial IDNCT06968442 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 to 65 with a BMI of 30 kg/m² or higher who are patients at Franciscus Hospital.

Probably not a fit

Patients with acute infections, systemic immunological disorders, or those on immune-modulatory medications may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study examines the role of obesity in the pathophysiology of severe COVID-19 by comparing blood samples from obese patients eligible for bariatric surgery with those from non-obese healthcare workers. It is a mono-center, prospective cohort study conducted at Franciscus Hospital, where participants will undergo venipuncture to collect blood samples for analysis. The goal is to understand how obesity may influence immune responses and disease severity in COVID-19 patients.

Why it matters

Potential benefit: If successful, this study could provide insights into how obesity impacts COVID-19 severity, potentially leading to better treatment strategies for affected patients.

How similar studies have gone: Other studies have explored the relationship between obesity and COVID-19 outcomes, suggesting that this approach may yield valuable insights.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion criteria:

Cohort 1 (obesity cohort)

* ≥18 and ≤65 years of age
* BMI ≥30 kg/m²
* Patient of Franciscus Hospital

Cohort 2 (control cohort)

* ≥18 and ≤65 years of age
* BMI \<25 kg/m²
* Healthcare workers of Franciscus Hospital

Exclusion Criteria (for both cohorts):

* Acute infection or current systemic immunological disorders
* Use of immune-modulatory medication (i.e., corticosteroids and biologicals)
* Hormonal therapy

Where it's running

  • Franciscus
    Rotterdam, South Holland, Netherlands
    Recruiting

Study contacts

  • Principal investigator: David S.Y. Ong, M.D., Ph.D., Pharm.D., M.Sc. — Franciscus Hospital
  • Study coordinator: Willem A Mak, M.Sc.
  • Email: ashwinmak98@gmail.com
  • Phone: +316 40897778

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.