Flu Clinical Trials

401 recruitingLast updated: July 25, 2026

There are 401 actively recruiting flu clinical trials across 67 countries. Studies span Not Applicable, Phase 4, Phase 2, Phase 3, Phase 1, Early Phase 1. Top locations include Chicago, Illinois, United States, New York, New York, United States, Philadelphia, Pennsylvania, United States. Updated daily from ClinicalTrials.gov.


Flu Trials at a Glance

401 actively recruiting trials for flu are listed on ClinicalTrialsFinder across 6 cities in 67 countries. The largest study group is Not Applicable with 149 trials, with the heaviest enrollment activity in Chicago, New York, and Philadelphia. Lead sponsors running flu studies include National Institute of Allergy and Infectious Diseases (NIAID), Mayo Clinic, and Ain Shams University.

Treatments under study

About Flu Clinical Trials

Looking for clinical trials for Flu? There are currently 4 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Flu trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Flu clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 401 trials

Recruiting
Phase 1

pH1N1 Blinded Challenge Study

Influenza
National Institute of Allergy and Infectious Diseases (NIAID)90 enrolled2 locationsNCT07110532
Recruiting
Phase 2

BPL-1357 Against H1N1 Influenza Virus Challenge

HumanInfluenza
National Institute of Allergy and Infectious Diseases (NIAID)129 enrolled2 locationsNCT07215858
Recruiting
Not Applicable

Multi-Site Detection of Barrett's Esophagus in Patients Without Chronic GERD Symptoms

Esophageal AdenocarcinomaBarrett EsophagusGastroesophageal Reflux
Case Comprehensive Cancer Center800 enrolled5 locationsNCT06687603
Recruiting
Phase 1

Quadrivalent Influenza HA Stem Vaccine VRC-FLUMOS0122-00-VP (SteMos1) With and Without ALFQ Adjuvant in Healthy Adults

Influenza PreventionPandemic Influenza Prevention
National Institute of Allergy and Infectious Diseases (NIAID)56 enrolled1 locationNCT07111078
Recruiting
Phase 1

Evaluating the Dose, Safety, Tolerability, and Immunogenicity of Mosaic Hexavalent Influenza Vaccine VRCFLUMOS0116-00-VP (FluMos-v2) With and Without ALFQ Adjuvant in Healthy Adults

Influenza PreventionSeasonal Influenza
National Institute of Allergy and Infectious Diseases (NIAID)45 enrolled1 locationNCT06863142
Recruiting

HeartBeam ECG Registry

Atrial FibrillationArrhythmiaAtrial Flutter+2 more
HeartBeam, Inc.600 enrolled1 locationNCT07501299
Recruiting
Not Applicable

Transpyloric Versus Gastric Feeding in Bronchopulmonary Dysplasia

Gastroesophageal RefluxBronchopulmonary Dysplasia
Children's Hospital of Philadelphia60 enrolled4 locationsNCT06534359
Recruiting

Screening for LID Clinical Studies Unit Healthy Volunteer Protocols

ZikaInfluenza
National Institute of Allergy and Infectious Diseases (NIAID)5,000 enrolled1 locationNCT01386424
Recruiting
Phase 2

Baloxavir and Oseltamivir for the Treatment of Severe Influenza Infection in Immunocompromised Patients

Hematopoietic and Lymphoid Cell NeoplasmInfluenza
M.D. Anderson Cancer Center60 enrolled1 locationNCT04712539
Recruiting
Not Applicable

Anteroposterior Versus Anterolateral Electrode Position for Electrical Cardioversion of Atrial Fibrillation

Atrial FibrillationAtrial Flutter
McMaster University1,750 enrolled4 locationsNCT05511389
Recruiting
Phase 3

A Multicenter, Randomized, Double-blind, Placebo-controlled Phase III Clinical Study to Evaluate the Safety and Efficacy of Onradivir Tablets in Participants Aged 12 to 17 Years With Uncomplicated Influenza A.

Influenza
Ruijin Hospital150 enrolled1 locationNCT07229547
Recruiting
Not Applicable

Mechanistic and Clinical Outcomes of a Surgical Innovation Aimed at Minimizing GERD Associated With VSG (INNOVATE-VSG)

ObesityBariatric SurgeryGastroesophageal Reflux Disease+1 more
University of California, Irvine44 enrolled2 locationsNCT06783751
Recruiting
Not Applicable

The FILTRATE Trial: High-Rate Ultrafiltration for Intravascular Congestion

Fluid OverloadCongestive Heart Failure(CHF)End Stage Chronic Renal Failure+1 more
Universidad Autonoma de Nuevo Leon70 enrolled1 locationNCT07705269
Recruiting
Not Applicable

New Topical tReatment Options for Symptomatic patiEnts With Nonerosive gastroesophageaL Reflux dIsease (The RELIEF Trial)

GERD (Gastroesophageal Reflux Disease)NERDRegurgitation, Gastric+1 more
Cellmedis50 enrolled1 locationNCT07624383
Recruiting
Not Applicable

QUality of Sleep Improvement With Evening Topical Therapy for Non-Erosive Gastroesophageal Reflux Disease (The QUIET Trial)

GERD (Gastroesophageal Reflux Disease)Non-Erosive Gastro-Esophageal Reflux DiseaseNocturnal Symptoms of GERD+1 more
Cellmedis50 enrolled2 locationsNCT07700342
Recruiting
Phase 1Phase 2

A Single-Arm, Blinded, Fluorescent PSMA Histopathology Trial of AS1986NS

Prostate CancerFluorescence ImagingProstate Cancer (Adenocarcinoma)
Antelope Surgical Solutions, Inc10 enrolled2 locationsNCT06906471
Recruiting
Not Applicable

The Effects of Endotracheal Suctioning on Pain and Serum Markers

SepsisAdultPneumonia+12 more
Loma Linda University110 enrolled1 locationNCT06692400
Recruiting

EUS Procedures Using RIVOS™ EUS Access Device

Chronic PancreatitisPancreatic Cancer Non-resectableBiliary Obstruction+2 more
Orlando Health, Inc.30 enrolled1 locationNCT07696572
Recruiting

Volume Removal Intolerance During Net Ultrafiltration in Acute Kidney Injury Patients

Acute Kidney InjuryCritical IllnessRenal Replacement Therapy for Acute Kidney Injury in ICU+2 more
Hospital Las Higueras128 enrolled10 locationsNCT07643597
Recruiting

Study on Hydrotalcite for Relief of Acid Symptoms Due to Acid Rebound After Stopping Long-Term PPI Therapy

Gastroesophageal Reflux
Bayer167 enrolled2 locationsNCT07291700