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Understanding Immunity to the Flu Vaccine in COVID-19 Patients

Stanford University · with National Institute of Allergy and Infectious Diseases (NIAID) · NCT04579588

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 9–64 · All sexes
Healthy volunteers
Accepted
Study type
Observational
Target enrollment
230
US sites recruiting
1
Study start
October 29, 2020
Record last updated
March 18, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

The purpose of this study is to measure immunity to the flu vaccine over time in patients who have had COVID-19 and may have other medical conditions including obesity, type 2 diabetes, chronic fatigue, or long-term COVID-19 symptoms. Adults and children (age 9 to 64) who had been diagnosed with COVID-19 as well as controls without COVID-19 will be invited to participate in this study.

Being studied: Flu shot

Conditions: Corona Virus Infection; Flu Vaccine; Immunity

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • Age 9 through 64 years
  • Diagnosed with COVID-19 at least 2 months prior enrollment
  • Patients with or without obesity, diabetes, chronic fatigue and/or long term COVID-19 symptoms
  • Patients without COVID-19 diagnosis for controls

Exclusion Criteria

  • Received the influenza vaccine less than 4 months ago
  • Pregnant or lactating
  • Patients with special risks attendant to venipuncture
  • Use of immunomodulatory medications that may impact vaccine immune response per clinician's judgment
  • Contraindication to the flu vaccine
  • Immunodeficiency or autoimmune disease that may impact vaccine immune responses per clinician's judgement

Recruiting US locations

  • Stanford University

    Palo Alto, CA 94304

    Site contact: SNP Center Inquiry · (650) 521-7237 · snpcenterallergy_inquiry@stanford.edu

Study contacts (from the official record)

  • SNP Center Inquiry · (650) 521-7237 · snpcenterallergy_inquiry@stanford.edu
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Understanding Immunity to the Flu Vaccine in COVID-19 Patients (NCT04579588) | Bored Studies