Clinical trials
Vaccine Response clinical trials
Below are recruiting vaccine response clinical trials, each written for real people, not researchers. We’re tracking 58 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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 - NCT03323112Recruiting
Studying immune responses to seasonal flu shots in health workers
This study looks at how your immune system (your body’s infection-fighting system) responds after you get the seasonal flu vaccine. It may help researchers understand what the vaccine triggers in people working in healthcare and labs.
HelsinkiAges 18–64 - NCT05077137RecruitingPhase 1
Testing an immune memory boost with checkpoint therapy
This early study tests whether “immune recall” (training the immune system using specific vaccine-like steps) can improve how well checkpoint drugs work for advanced melanoma. It is designed mainly to see if the approach is feasible and safe, and it may help some people respond better to PD-1 (with or without CTLA-4) treatment.
Durham, North CarolinaAges 18 years+ - NCT07156084RecruitingPhase 4
HPV vaccine long-term effect study for young adults
This study checks if one dose of the 9-valent HPV vaccine given at ages 9-11 still protects you 6 years later. It is for people who only had that single dose and no other HPV shots.
Québec, QuebecAges 15–17 - NCT06810934RecruitingPhase 1/Phase 2
New COVID-19 vaccine study for those with prior mRNA vaccines
This study tests a new type of COVID-19 vaccine that is designed to train your immune system to make stronger, longer-lasting protection. You may be able to join if you are 40–64, have already had at least two doses of a mRNA COVID-19 vaccine (Pfizer or Moderna) more than 4 months ago, and are generally healthy.
Los Angeles, CaliforniaAges 40–64 - NCT07534007Recruiting
Shingles vaccine response in patients on immune-modifying drugs
This study tests a new shingles vaccine in people with psoriasis or myelofibrosis, some of whom take immune-modifying medications. Researchers want to understand how well the vaccine works and how the immune system responds in these groups.
Pavia, LombardaAges 18–100 - NCT06806137RecruitingPhase 3
Chickenpox vaccine study for healthy toddlers
This study tests how well a second dose of an investigational chickenpox vaccine works and how safe it is in healthy children. Your child would get the first dose between 12-15 months old, then a booster 3 months later.
Salvaleón de Higüey, La Altagracia ProvinceAges 1 year–1.3 years - NCT04970836Recruiting
Hepatitis B revaccination for young adults in Taiwan
This study looks at how well your immune system responds after getting 1–2 extra doses of the hepatitis B vaccine. It may help doctors understand who needs revaccination and how to strengthen protection.
TaipeiAges 20–36 - NCT07406360RecruitingPhase 3
Combined MMR and chickenpox vaccine booster for children
This study tests a combined vaccine that protects against measles, mumps, rubella, and chickenpox (varicella) in one shot. It's for healthy children who have already had their first dose of chickenpox and MMR vaccines, to see if this booster is safe and works well.
Birmingham, AlabamaAges 1.3 years–6 years - NCT05672927RecruitingPhase 4
Comparing HPV vaccine schedules: 2 doses vs 3 doses
This study compares how well your immune system responds to an HPV vaccine given as either 2 doses or 3 doses in people ages 27–45 who have never had the HPV vaccine. It may help improve HPV prevention strategies and guide the best dose schedule for adults.
Galveston, TexasAges 27–45
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Common questions
- Are there clinical trials for vaccine response?
- Yes. Clin2 currently lists 58 recruiting vaccine response 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 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 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.