Clinical trials
Vaccine Response Impaired clinical trials
Below are recruiting vaccine response impaired clinical trials, each written for real people, not researchers. We’re tracking 14 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05801978RecruitingPhase 4
How long a vaccine’s immune response lasts in adults
This study checks how long your body’s protection signals last after a vaccine. It may help researchers understand which vaccines give longer-lasting immune responses and who may need boosters.
Atlanta, GeorgiaAges 18–50 - NCT06262776Recruiting
Shingles vaccine safety study for transplant recipients
This trial tests whether the shingles vaccine (RZV) is safe and works well for organ transplant recipients and their household members. It also includes people on dialysis or certain immunosuppressants.
Adelaide, South AustraliaAges 18 years+ - NCT06148025RecruitingPhase 4
Do antibiotics affect vaccine responses?
This study looks at whether taking a short course of antibiotics can change how your body responds to two vaccines (BCG and yellow fever). It may help researchers find ways to make vaccines work better.
Adelaide, South AustraliaAges 18–35 - NCT05923970Recruiting
MMRV vaccine booster in pregnant adults in Alberta
This study looks at whether getting a third dose of the MMRV vaccine during pregnancy is helpful. It focuses on pregnant women who were screened for rubella immunity during routine prenatal testing.
Edmonton, AlbertaAges 18 years+ - NCT06832514RecruitingPhase 4
Gender and immune response to meningitis B vaccine
This study tests how well the meningitis B vaccine works in transgender and cisgender people. It aims to understand if sex and gender affect immune responses.
GhentAges 18–50 - NCT06336317RecruitingPhase 4
Flu vaccine after heart attack: effect on heart inflammation
This trial tests whether getting a flu vaccine shortly after a heart attack can reduce inflammation in the heart. If you've recently had a non-ST-segment elevation heart attack and a stent placed, you may be able to join.
AarhusAges 18 years+ - NCT05291676RecruitingPhase 2
Study how vaccines work in aging and frailty adults
This trial studies how well your immune system responds to a vaccine in people who are younger adults or, especially, older adults and those with frailty. Your participation may help researchers understand why vaccine responses can differ with age.
New Haven, ConnecticutAges 21 years+ - NCT05562323Recruiting
Study of immune response after monkeypox vaccination
This is an observational study that follows adults after they get a monkeypox vaccine to learn how their immune system responds. The results may help researchers understand what types of protection the vaccine creates.
Badalona, BarcelonaAges 18 years+ - NCT01244802Enrolling by invitation
Study of immune memory after yellow fever vaccination
This study looks at how your immune system “remembers” the yellow fever vaccine over time. It may help researchers understand long-term immune protection and how it varies between people.
Decatur, GeorgiaAges 18 years+ - NCT07663032RecruitingPhase 1
Pan-Salmonella vaccine study for healthy young adults
This trial tests an experimental vaccine designed to protect against multiple types of Salmonella bacteria (which cause typhoid fever and other infections). It is given to healthy adults aged 18 to 45 to check safety and immune response.
BloemfonteinAges 18–45 - 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 - NCT01720836RecruitingPhase 1/Phase 2
MUC1 peptide vaccine study for non-small cell lung cancer
This trial tests a vaccine made from a lung-cancer target (MUC1) to help your immune system recognize and fight the cancer. It is designed to measure immune response and safety, and it may help some people develop a stronger anti-cancer immune reaction.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT07527247RecruitingPhase 2
Testing a New Yellow Fever and Dengue Vaccine
This study tests a new vaccine designed to improve protection against yellow fever and dengue fever in healthy adults. Researchers want to see if this vaccine works better than existing ones and is safe.
SingaporeAges 21–59 - NCT06702449RecruitingPhase 1/Phase 2
UTI vaccine safety and immune response study for adults 18-64
This trial tests a new vaccine to prevent urinary tract infections (UTIs). It first checks safety and immune response in healthy adults, then in women with recent E. coli UTIs. The goal is to see if the vaccine can reduce future infections.
Lenexa, KansasAges 18–64
Hear when a new Vaccine Response Impaired trial opens
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Common questions
- Are there clinical trials for vaccine response impaired?
- Yes. Clin2 currently lists 14 recruiting vaccine response impaired 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 vaccine response impaired 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 vaccine response impaired 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.