Clinical trials
Vaccination; Infection clinical trials
Below are recruiting vaccination; infection clinical trials, each written for real people, not researchers. We’re tracking 91 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT03132311RecruitingPhase 4
Yellow fever vaccine study for certain people with HIV
This trial checks whether a yellow fever vaccine is safe and works well in adults with HIV who have relatively healthy immune function. It may help doctors understand the best way to protect people with HIV who have never had this vaccine.
Rio de JaneiroAges 18–59 - NCT06907667Recruiting
Do timing of flu shot affect protection in kidney failure?
This study looks at whether getting a flu shot at a different time of day affects how well it works in people with chronic kidney failure, including those on dialysis or with a kidney transplant. Researchers want to see if timing can improve the body's immune response to the vaccine.
Nice, Alpes-MaritimesAges 18–100 - NCT07266857Recruiting
Study on HPV vaccine education in middle schools
This trial tests if an educational program called e-Bug can increase HPV vaccination rates. It uses only anonymous data from schools, so no individual enrollment is needed.
Nice, Alpes MaritimesAges Any age - 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 - 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 - NCT04664569Recruiting
Study of treatments for bacterial meningitis in children
This study enrolls children and newborns with suspected or confirmed bacterial meningitis. The goal is to understand and improve care for serious infections that affect the lining around the brain.
CréteilAges 1 day–18 years - NCT06492187Recruiting
Survey to see if you qualify for infectious disease studies
This trial is a quick survey to see if you might be eligible for future infectious disease studies. It helps researchers understand your health background and find the right study for you.
Brooklyn, New YorkAges 18 years+ - NCT06608199RecruitingPhase 3
Pneumonia vaccine study for healthy infants
This study tests a new pneumonia vaccine (PCV13) in healthy infants to see if it works as well as a current vaccine. It compares the immune response and safety of the two vaccines.
Denpasar, BaliAges 1 month–2 months - 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+ - NCT06776692Recruiting
Dengue vaccine immunity study for all ages
This study looks at how the dengue vaccine works in people with and without past exposure to dengue or similar viruses like yellow fever or Zika. Volunteers receiving the dengue vaccine will give blood samples to help researchers understand the immune response.
Negrar, VRAges 4 years+ - NCT07016152RecruitingPhase 1
A study of a Klebsiella vaccine for healthy adults
This trial tests a new two-part vaccine (CHO-V08) to prevent Klebsiella pneumoniae infection. It looks at safety and immune response in healthy adults aged 18 to 50.
TaipeiAges 18–50 - NCT04706390Recruiting
Study compares immune response after COVID infection vs vaccination
This study looks at how your immune system responds after natural COVID-19 infection compared with after COVID vaccination. It may help researchers understand how well different experiences train the body’s defenses.
BergenAges 20–100 - NCT05266898RecruitingPhase 4
HPV vaccine response study for people living with HIV
This trial studies how well the Gardasil-9 HPV vaccine triggers the body’s immune response in people living with HIV. It may help doctors understand the best way to protect against HPV-related cancers and infections in this population.
New Orleans, LouisianaAges 18–65 - NCT01374984Enrolling by invitation
Test VIGIV treatment for serious complications from smallpox vaccination
This trial looks at how well a medicine called VIGIV works for people who develop serious or unusual vaccinia (smallpox-type) infections or complications after smallpox vaccination. It is mainly for specific skin and body-area problems, including eczema-related complications.
Ages Any age - NCT04579588Recruiting
Study flu vaccine immunity in people after COVID-19
This study looks at how well your immune system (your body’s infection-fighting system) responds to a flu vaccine after you’ve had COVID-19. It may help doctors understand why some people have different protection after vaccines.
Palo Alto, CaliforniaAges 9–64 - NCT06834100RecruitingPhase 3
Comparing a new meningitis vaccine to an approved one
This trial tests a new meningitis vaccine (GNG-DE) to see how well it works compared to a vaccine already on the market. It might help protect you or your child from meningococcal disease.
KirovAges 3–55 - 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+ - NCT05371353Recruiting
Study of how long HPV vaccine immunity lasts
This study checks how well the HPV (cancer-preventing) vaccine protection stays in your body over time. It may help confirm the vaccine’s “long-lasting” immune response and guide future vaccination confidence.
Yangchun, GuangdongAges 9–45 - NCT07473999Recruiting
Vaccine protection in transplant recipients
This study looks at how well vaccines work in people who have received a bone marrow or solid organ transplant. Researchers will track infections and outcomes to understand vaccine effectiveness.
Pavia, LombardyAges Any age - NCT06955728RecruitingPhase 3
RSV vaccine in pregnancy to protect babies
This study tests an approved RSV vaccine given to pregnant women. The goal is to see if it safely protects their babies from severe RSV lung infections during the first months of life.
Kintampo, Bono EastAges 14–55 - NCT06841913RecruitingPhase 4
Woodsmoke, flu, and your nasal immune response
This study tests how breathing woodsmoke affects your nose's ability to fight off the flu virus. You will be exposed to woodsmoke and then given a live flu vaccine to see how your immune system responds.
Chapel Hill, North CarolinaAges 18–49 - 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+ - NCT07668271RecruitingPhase 4
HPV 9-valent vaccine lot consistency trial for women
This trial tests whether different batches of the HPV 9-valent vaccine work consistently. It's for Chinese women aged 18 to 30 who have not had any HPV vaccine or abnormal cervical screening results.
Zhangping, FujianAges 18–30 - NCT06484335RecruitingPhase 1
Testing an HIV vaccine and antibody combo for treatment-free control
This study tests a combination of an HIV vaccine and an antibody infusion to see if your immune system can control HIV without daily pills. You would temporarily stop your HIV medication under close monitoring and restart if needed.
Pathum Wan, BangkokAges 18–60
Hear when a new Vaccination; Infection trial opens
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Common questions
- Are there clinical trials for vaccination; infection?
- Yes. Clin2 currently lists 91 recruiting vaccination; infection 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 vaccination; infection 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 vaccination; infection 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.