Clinical trialNCT05584735CompletedObservational

Determining the Relationship Between Gut Microbiota and Immune Response to Influenza or COVID-19 Vaccine

SponsorUniversity of Wisconsin, MadisonEnrollment46Inflammatory Bowel Diseases

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This study will evaluate the effect of the microorganisms in the gut on how well the flu or COVID-19 vaccine works in people who have a weakened immune system due to inflammatory bowel disease. Participants can expect to be in the study for up to 65 days.

clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

Freddy Caldera, DO, MS
University of Wisconsin, Madison
Principal Investigator
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A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

1 registered facility, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

University of Wisconsin School of Medicine and Public Health
Madison, Wisconsin, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

COVID-19 VACCINEInfluenza vaccine

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 3 Nov 2023
Primary completion: 20 Mar 2025
Completion: 20 Mar 2025
Last update posted: 31 Jul 2025
Registered enrollment: 46
Registry id: NCT05584735

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.