Clinical trials
Vaccination clinical trials
Below are recruiting vaccination clinical trials, each written for real people, not researchers. We’re tracking 602 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05015686Enrolling by invitationPhase 3
Live chickenpox vaccine safety study for healthy teens and adults
This trial tests how safe and how well a live, weakened chickenpox (varicella) vaccine works in healthy people age 13 and older. If you qualify, you may receive the study vaccine and be monitored for side effects and immune response.
Shangqiu, HenanAges 13 years+ - 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 - NCT07505836RecruitingPhase 3
Meningitis vaccine trial for toddlers aged 12–23 months
This study tests a vaccine that protects against four common types of meningitis (groups A, C, Y, and W135) in toddlers aged 12–23 months. It helps researchers see if the vaccine is safe and works well for young children.
Nanning, GuangxiAges 1 year–1.9 years - NCT07505810RecruitingPhase 3
Meningitis vaccine trial for infants 3-5 months old
This trial tests a vaccine that protects against four types of meningococcal bacteria (groups A, C, W, and Y) in healthy babies aged 3 to 5 months. The vaccine is given to help prevent meningitis and other serious infections.
Nanning, GuangxiAges 3 months–5 months - NCT07505823RecruitingPhase 3
Meningococcal vaccine trial for infants 6-11 months old
This study tests whether a new vaccine safely protects infants aged 6 to 11 months against four types of meningococcal bacteria that can cause serious infections like meningitis and blood infections. It is designed for healthy babies who have not yet received any meningococcal vaccine.
Nanning, GuangxiAges 6 months–11 months - NCT07730450RecruitingPhase 4
COVID-19 vaccine study for healthy adults aged 18 to 64
This trial tests a COVID-19 vaccine in healthy adults to see how well it works. It may be an option if you are not at higher risk for severe COVID-19 and have not had COVID-19 in the past 6 months.
Walnut Creek, CaliforniaAges 18–64 - NCT04220671Enrolling by invitationPhase 4
Measles vaccination for children during hospital visits
This trial offers a measles vaccine to children who have not had full measles shots, timed around visits to a children’s hospital. It aims to see whether vaccinating children at these health care contacts helps improve protection against measles.
BissauAges 9 months–4.9 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 - NCT05208710RecruitingEarly Phase 1
Study new HPV vaccine in healthy adults
This early study tests a new HPV (human papillomavirus) vaccine to see if it can safely trigger an immune response in healthy adults. It’s for people who have not had an HPV vaccine before and can follow study vaccination and pregnancy-prevention rules.
HeidelbergAges 18–45 - NCT07510308RecruitingPhase 1
Vaccine trial for advanced colorectal cancer
This trial tests a personalized vaccine made from your own tumor cells for advanced colorectal cancer that is mismatch repair proficient (pMMR). It aims to see if the vaccine can help when standard treatments have stopped working.
Chengdu, SichuanAges 18–75 - NCT06995157Recruiting
HPV infections and vaccine attitudes in Slovenian women
This observational study looks at HPV infections and women's views about the HPV vaccine in Slovenia. It aims to understand the characteristics of HPV infections and attitudes toward vaccination after the vaccine became available.
Ljubljana, Municipality of DomžaleAges Up to 35 years - NCT07377656RecruitingPhase 2
HPV vaccine delivery with childhood shots
This trial tests a way to give HPV vaccines along with routine childhood immunizations in Ghana. It aims to protect against HPV, a virus that can cause cervical cancer, by making it easier to get the vaccine.
AccraAges 9 months–20 years - NCT04458545RecruitingPhase 1/Phase 2
Opioid vaccine study for adults with heroin or fentanyl use
This trial tests a vaccine made from parts designed to help the body respond to opioids (heroin or fentanyl). It is mainly for adults with moderate-to-severe opioid use disorder who are using opioids that match the study dosing needs and who are willing to do frequent visits over about a year.
Eatontown, New JerseyAges 18–59 - NCT04875819RecruitingPhase 4
HIV vaccine safety check for meningitis and pneumonia shots
This trial studies how safe and how well the body’s immune system responds to meningococcal and pneumococcal vaccines in adults living with HIV. It may help confirm these vaccines work properly and are safe for people on HIV treatment.
HvidovreAges 18 years+ - 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 - NCT05571735Recruiting
COVID vaccine immune response study in people with tuberculosis
This study measures how strongly your immune system responds to COVID-19 vaccines. It includes people with newly diagnosed tuberculosis and a healthier comparison group, aiming to understand vaccine immune effects and safety.
Mae Ramat, Changwat TakAges 18 years+ - NCT06088745RecruitingPhase 3
Shingles vaccine trial for adults 40+
This trial tests a new shingles vaccine to see how well it prevents shingles in adults aged 40 and older. It aims to help those who have not had shingles recently or been vaccinated against it before.
Zhenjiang, JiangsuAges 40 years+ - NCT06135636RecruitingPhase 4
Helping partners get the Tdap vaccine during pregnancy
This trial tests different ways to help partners of pregnant people get the Tdap vaccine (a shot that protects against tetanus, diphtheria, and whooping cough). The goal is to find the best way to increase vaccination rates among partners, which can help protect the newborn from whooping cough.
Providence, Rhode IslandAges 19–50 - NCT06184542RecruitingPhase 1
New DTaP vaccine safety trial for children
This trial tests a new combined vaccine for diphtheria, tetanus, and whooping cough (pertussis) in children of different ages. It aims to see if the vaccine is safe and how well it works, helping to protect against these serious diseases.
Dazhou, SichuanAges 2 months–6 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+ - NCT06635525Recruiting
How kidney failure affects your flu shot response
This study looks at how well the flu vaccine works in people with kidney failure who are on dialysis compared to healthy people. It will help doctors understand how kidney problems affect the body’s immune response to vaccination.
MilanAges 18–70 - NCT06756269RecruitingPhase 2
HPV vaccine study for people aged 9 to 45
This trial tests a new 15-valent HPV vaccine to see if it is safe and creates a strong immune response. If you are between 9 and 45 years old and have not had an HPV vaccine before, you may be able to join.
Nanning, GuangxiAges 9–45 - 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 - NCT07097012RecruitingPhase 4
Whooping cough and RSV vaccines: together or separate in pregnancy
This study tests whether giving two vaccines—one for whooping cough (Tdap) and one for RSV—at the same time is safe and effective compared to giving them separately during pregnancy. It may help protect your baby from both diseases early in life.
Vancouver, British ColumbiaAges 18–49
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Common questions
- Are there clinical trials for vaccination?
- Yes. Clin2 currently lists 602 recruiting vaccination 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 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 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.