Skip to content

Understanding Immunity to the Flu Vaccine in COVID-19 Patients

Understanding Immunity to the Flu Vaccine in COVID-19 Patients

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04579588
Enrollment
230
Registered
2020-10-08
Start date
2020-10-29
Completion date
2028-04-01
Last updated
2026-03-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Corona Virus Infection, Flu Vaccine, Immunity

Brief summary

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.

Interventions

BIOLOGICALFlu shot

All participants will receive a single shot of the flu vaccine

Sponsors

Stanford University
Lead SponsorOTHER
National Institute of Allergy and Infectious Diseases (NIAID)
CollaboratorNIH

Study design

Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
9 Years to 64 Years
Healthy volunteers
Yes

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

Design outcomes

Primary

MeasureTime frame
Testing immunity to the flu vaccine over time1 week

Countries

United States

Contacts

CONTACTSNP Center Inquiry
snpcenterallergy_inquiry@stanford.edu(650) 521-7237
PRINCIPAL_INVESTIGATORSayantani Sindher, MD

Stanford University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 19, 2026