Clinical trials
Influenza clinical trials
Below are recruiting influenza clinical trials, each written for real people, not researchers. We’re tracking 108 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06824519RecruitingPhase 1/Phase 2
Quadrivalent flu vaccine trial for adults
This trial tests a new quadrivalent influenza (flu) vaccine in adults 18 and older. It aims to see if the vaccine is safe and helps protect against the flu. You may be able to join if you are generally healthy and have not had the flu or a flu shot recently.
Shijiazhuang, HebeiAges 18 years+ - NCT07192458RecruitingPhase 2
High vs. Standard Dose Flu Vaccine in Lung Transplant
This study compares a high-dose flu vaccine to the standard dose in lung transplant recipients. It aims to see if a higher dose gives better protection against the flu.
Nashville, TennesseeAges 18 years+ - NCT07485855RecruitingPhase 3
Flu vaccine study for blood cancer patients
This trial tests how well the flu vaccine works in people with blood cancers like lymphoma, leukemia, or multiple myeloma. It aims to find the best vaccination strategy to protect you during treatment.
SeoulAges 19 years+ - NCT05215327RecruitingPhase 2
Higher-dose flu vaccine vs standard dose after lung transplant
This trial tests whether a higher dose of flu vaccine works better than the standard dose for people who have had a lung transplant. It may help improve protection against seasonal flu while monitoring safety.
Nashville, TennesseeAges 16 years+ - NCT05832307Recruiting
Testing whether inpatient flu shots improve vaccination rates
This trial looks at an organized plan to give flu vaccines during hospital stays. It may help more inpatients get protected against influenza before they leave the hospital.
Chicago, IllinoisAges 6 months–99 years - NCT05947071RecruitingPhase 2
Higher-dose flu vaccine versus standard dose in child transplant patients
This trial compares a higher-dose flu vaccine to the standard dose in children who recently received a kidney, heart, and/or liver transplant. It aims to see which dose better protects children against influenza while checking for safety.
Stanford, CaliforniaAges 3–17 - NCT06842173RecruitingPhase 1/Phase 2
Safety testing of new bird flu vaccine (H5N8) in adults
This trial tests a new bird flu (H5N8) vaccine for adults aged 18 and older. It looks at how safe the vaccine is and how well it triggers an immune response. The vaccine is given as a shot and includes an adjuvant to boost protection.
Belo Horizonte, Minas GeraisAges 18 years+ - NCT07203755RecruitingPhase 1
Combination vaccine for whooping cough, Hib, and meningitis
This trial tests a new combination vaccine that protects against whooping cough, Haemophilus influenzae type b (a cause of meningitis and pneumonia), and several types of meningococcal disease (a cause of meningitis and bloodstream infections). It may help reduce the number of shots needed for children.
Shangqiu, HenanAges 2 months–6 years - NCT07302256RecruitingPhase 1
Flu vaccine trial for adults 60 and older
This trial tests an influenza (flu) vaccine in people aged 60 and above. It aims to see if the vaccine is safe and works well for older adults, who are at higher risk for flu complications.
Wuhan, HubeiAges 60 years+ - NCT07305207RecruitingPhase 1
Influenza H3N2 infection study for pandemic preparedness
This study gives healthy adults a controlled dose of influenza H3N2 virus to learn how the body responds. The goal is to build a model that can help develop better vaccines and treatments for future flu pandemics.
Halifax, Nova ScotiaAges 18–45 - NCT06863142RecruitingPhase 1
Testing a new flu vaccine with or without adjuvant
This study tests a new investigational flu vaccine (FluMos-v2) with or without an adjuvant (ALFQ) to see how safe, tolerable, and effective it is. It may help protect against multiple flu strains.
Bethesda, MarylandAges 18–50 - NCT07111078RecruitingPhase 1
New Flu Vaccine (Stem) with or without Booster
This trial tests a new type of flu vaccine that targets a part of the virus that doesn't change much (the stem). It is given with or without a special booster, and researchers want to see if it provides broader protection against different flu strains.
Bethesda, MarylandAges 18–50 - NCT06029933Recruiting
Comparing two flu vaccines for older adults
This study compares two types of flu shots for people 65 and older to see which works better. If you are a Kaiser Permanente member and get your flu shot at a Kaiser facility, this trial looks at your health records to see how well the vaccine protected you.
Oakland, CaliforniaAges 65 years+ - NCT04367883Recruiting
Study of flu shots and blood-pressure medicines in COVID
This study looks at people who were admitted to the hospital in Terrassa starting in March 2020. Researchers want to see whether having a flu vaccine and using certain blood-pressure medicines (ACE inhibitors or ARBs) is linked to how COVID infection develops.
Terrassa, BarcelonaAges Any age - NCT05108818RecruitingPhase 4
Study immune responses after an flu shot in healthy adults
This study gives you a flu vaccine and measures how your immune system reacts, including both “blood immunity” and “cell immunity.” It’s for healthy adults and mainly aims to better understand how well flu vaccines work in people without major health issues.
Philadelphia, PennsylvaniaAges 18 years+ - NCT05332899RecruitingPhase 1
Flu challenge study in healthy adults to test an investigational approach
This Phase 1 study tests an investigational influenza (flu) approach in a carefully selected group of healthy adults. It may help researchers understand how the flu challenge works and how well the treatment performs and is tolerated.
Atlanta, GeorgiaAges 18–49 - NCT05648448RecruitingPhase 2
Early flu antiviral trial for adults with confirmed influenza
This Phase 2 study compares antiviral medicines in adults who have early, flu-like symptoms and test positive for influenza. It aims to see which antiviral treatment works best and is safe for people treated soon after symptoms start.
Minas GeraisAges 18–60 - NCT06094010RecruitingPhase 3
Flu treatment and transmission study for children and families
This study tests how well a single-dose flu treatment (baloxavir marboxil) works for children with the flu and whether it stops the flu from spreading to family members. If your child has early flu symptoms and lives with others, participation could help protect your household.
Birmingham, AlabamaAges 3 weeks–11 years - NCT06355232RecruitingPhase 1
Oral vaccine for COVID-19 and flu
This study tests an experimental oral vaccine that may protect against both COVID-19 and the flu. Researchers want to see if it's safe and how the body responds.
Adelaide, South AustraliaAges 18 years+ - NCT06573008RecruitingPhase 3
Testing GP681 Tablets for Flu in High-Risk Patients
This study tests an oral tablet called GP681 for people with flu who are at higher risk of serious complications. It compares the new drug to a placebo to see if it helps reduce symptoms faster.
ChizhouAges 12 years+ - NCT06599658RecruitingPhase 2
COVID-19 booster and flu vaccine timing for people with weak immune systems
This study tests the best timing for a COVID-19 booster and flu shot in people with weakened immune systems, such as organ transplant recipients, people living with HIV, or those with certain autoimmune conditions. It aims to help patients get better protection from both vaccines.
Montreal, QuebecAges 18 years+ - NCT06620185Recruiting
Flu immunity study: Vaccination and infection in lungs
This study looks at how your lungs and lymph nodes respond to flu infection and the nasal flu vaccine. It will help researchers understand how to create better protection against the flu.
LondonAges 18–55 - NCT06653569RecruitingPhase 3
Baloxavir for flu in hospitalized adults
This trial tests if the antiviral drug baloxavir can help adults hospitalized with influenza recover faster. It compares baloxavir to a placebo to see if it improves symptoms and outcomes.
Geneva, Canton of GenevaAges 18 years+ - NCT06684379RecruitingPhase 1/Phase 2
Two Doses of PRS CK STORM for Severe Viral Pneumonia
This study tests a new drug called PRS CK STORM to see if it can safely calm the body's overactive immune response (cytokine storm) in people with severe pneumonia from COVID-19, flu, or RSV who need oxygen. It aims to reduce inflammation and improve recovery.
Alcalá de Henares, MadridAges 18 years+
Hear when a new Influenza trial opens
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Influenza trials by city
Studies with a site in or near these metro areas.
Influenza trials by state
Studies with a site anywhere in these states.
Common questions
- Are there clinical trials for influenza?
- Yes. Clin2 currently lists 108 recruiting influenza studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a influenza trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a influenza trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.