Clinical trials
Influenza clinical trials
Below are recruiting influenza clinical trials, each written for real people, not researchers. We’re tracking 115 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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 - 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+ - NCT06401720Enrolling by invitation
Flu immune response study by age
This study looks at how the immune system reacts to the flu in people of different ages. If you have flu symptoms and don't have cancer or take immune-suppressing drugs, you may be able to join.
SödertäljeAges 18 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+ - 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 - 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+ - 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 - 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 - 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+ - 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 - NCT02200276Recruiting
Flu shot study for adults over 75
This study looks at getting an influenza (flu) vaccine in adults age 75 and older. It may help doctors understand how to safely give flu shots to older adults.
Baltimore, MarylandAges 75 years+ - NCT07215858RecruitingPhase 2
Testing a new flu vaccine against H1N1 flu
This study tests an experimental flu vaccine (BPL-1357) in healthy volunteers who will later be exposed to H1N1 flu virus in a controlled setting, to see if the vaccine can prevent or reduce illness.
Bethesda, MarylandAges 18–55 - NCT07159763RecruitingPhase 3
Study of a new medicine to prevent flu
This study tests a new type of flu prevention medicine (called a monoclonal antibody) given as an injection. It is for people at higher risk of getting the flu, including those with certain health conditions or weakened immune systems.
Anniston, AlabamaAges 12 years+ - NCT05616546RecruitingPhase 4
Study of immune responses during and after flu infection
This study looks at how your immune system (your body’s infection-fighting system) responds during and around the time of a flu illness. It’s meant to help researchers better understand immune changes in healthy adults and may guide future flu care.
Atlanta, GeorgiaAges 18–64 - NCT07851246RecruitingPhase 3
Flu vaccine study for adults 18 to 64
This study tests a new flu vaccine to see how well it protects adults aged 18 to 64. If you join, you'll get the vaccine and have some check-ups to see how your body responds.
Glendale, ArizonaAges 18–64 - NCT07846423Recruiting
Rapid flu testing for fever and respiratory illness
This study tests a fast, point-of-care test to detect the flu in adults who have fever and respiratory symptoms. The goal is to see if this quick test can help doctors diagnose and treat flu more effectively.
TaichungAges 20 years+ - NCT06446232Recruiting
Flu vaccine effectiveness in young children
This trial studies how well the flu vaccine works in young children in Taiwan. To join, your child must have a positive flu test and a known vaccination record.
TaipeiAges 6 months–18 years - NCT07779408RecruitingPhase 1/Phase 2
H5N8 flu vaccine study for healthy adults
This study tests an experimental flu vaccine designed to protect against the H5N8 bird flu virus. It is given with an ingredient that may boost the immune response. The study will check if the vaccine is safe and how well it triggers the body's defenses.
Tempe, ArizonaAges 18 years+ - NCT06667063Recruiting
Immune response study for COVID-19 and flu
This study looks at how your immune system responds to COVID-19 or the flu. It may help researchers understand these infections better, whether you are currently sick or healthy.
Wuhan, HubeiAges 18 years+ - NCT07678619Enrolling by invitation
Smart tools for infectious disease decisions
This study tests a smart analysis system to help local health officials make better decisions during infectious disease outbreaks. It aims to see if this tool improves speed and accuracy in responding to diseases like COVID-19, mpox, or flu.
Beijing, Beijing MunicipalityAges 18 years+ - NCT06672692Recruiting
Study of a new test for flu, RSV, and COVID-19 in people with symptoms
This trial evaluates a new test that can detect flu A/B, RSV, and COVID-19 from a single nose swab. It is for people who are currently sick with respiratory symptoms and are either hospitalized, in the ER, visiting a clinic, or living in a long-term care facility.
Henderson, NevadaAges Any age - NCT07617376RecruitingPhase 4
Flu shot before leaving hospital after heart problems
This study tests whether giving a flu vaccine to patients before they leave the hospital after a heart condition improves their health. The vaccine may help protect your heart and prevent serious flu complications while you recover.
WroclawAges 18 years+ - NCT07599449Recruiting
Tracking respiratory infections in French primary care
This study tracks viruses that cause sudden colds and flu-like illnesses during winter months in France. Researchers collect information from patients seen by participating doctors to better understand which respiratory viruses are circulating and help prepare for future outbreaks.
ParisAges Any age - NCT06574503RecruitingPhase 3
New pill to prevent flu after exposure
This study tests a new antiviral pill, GP681, to prevent the flu in people who live with someone who has the flu. If you haven't gotten sick yet and are otherwise healthy, this might help keep you from catching it.
HanzhouAges 12 years+
Hear when a new Influenza trial opens
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Common questions
- Are there clinical trials for influenza?
- Yes. Clin2 currently lists 115 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.