Clinical trials
Vaccination clinical trials
Below are recruiting vaccination clinical trials, each written for real people, not researchers. We’re tracking 575 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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 - 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 - 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+ - NCT06148025RecruitingPhase 4
Antibiotics and vaccine response study
This study looks at whether taking a short course of antibiotics changes how well vaccines work. You would receive the BCG vaccine (for tuberculosis) and possibly the yellow fever vaccine, and we would check your immune response over several months.
Adelaide, South AustraliaAges 18–35 - 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 - 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+ - 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 - NCT04953130RecruitingPhase 4
HPV vaccine for boys in Tanzania
This trial studies whether giving one dose of the HPV vaccine to boys, in addition to vaccinating girls, helps protect more people from HPV-related cancers. Boys aged 14-18 who live in certain communities in Tanzania may be able to take part.
MwanzaAges 14–18 - 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 - 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 - NCT04834869Recruiting
Track safety after COVID-19 vaccination in adults
This study follows adults who have already received a COVID-19 vaccine to monitor side effects and safety over time. Your participation helps researchers understand how the vaccine affects different people who are at higher risk due to their work.
Philadelphia, PennsylvaniaAges 18 years+ - NCT06023056Recruiting
Hepatitis B vaccine after newborn surgery
This trial tests whether giving the hepatitis B vaccine to full-term newborns who had multiple stomach or intestine surgeries is safe and works well. It aims to protect these babies from hepatitis B infection.
Chongqing, Chongqing MunicipalityAges Any age - NCT06044077RecruitingPhase 3
Testing a new pneumonia vaccine in healthy people
This trial tests a new 23-valent pneumococcal vaccine to see if it safely protects healthy people against pneumonia and other infections caused by pneumococcal bacteria.
Chengdu, SichuanAges 2 years+ - NCT04446832Recruiting
Vaccine study for people waiting for liver transplant
This study tests a vaccine strategy for people who are being evaluated and waiting for a liver transplant. The goal is to see how well the immune system responds and how the results are interpreted before transplant.
LyonAges 18 years+ - NCT06168032Recruiting
COVID-19 vaccine for lung cancer patients
This trial is testing how well the COVID-19 vaccine works for people with lung cancer to prevent another infection. It also looks at certain biomarkers in your blood that might help predict your body's immune response.
BeijingAges 18 years+ - NCT07860216RecruitingPhase 3
RSV vaccine safety and immune response study for older adults
This trial tests an experimental vaccine to protect older adults against respiratory syncytial virus (RSV), a common virus that can cause serious lung infections. It looks at whether the vaccine is safe and how well it boosts immunity. If you are healthy and over 60, you might be able to join.
GuiZhou, GuizhouAges 60 years+ - NCT06333275Recruiting
Boosting immunity after CAR-T therapy
This trial checks if giving vaccines after CAR-T cell therapy can help your immune system fight off preventable diseases. It is for adults with certain blood cancers who are about to get CAR-T treatment.
BernAges 18 years+ - NCT07805707RecruitingPhase 3
Flu vaccine study for adults 65 and older
This study tests a new flu vaccine in adults aged 65 and older to see how well it prevents the flu. If you are generally healthy or manage chronic conditions well, you may be able to join.
Anniston, AlabamaAges 65 years+ - NCT07794748RecruitingPhase 3
Pneumococcal vaccine study for adults aged 18 to 49
This study tests a new pneumococcal vaccine to see if it is safe and triggers a good immune response. It may help protect you from infections like pneumonia, but you must not have had any pneumococcal vaccine since age 5.
Birmingham, AlabamaAges 18–49 - NCT06521944Recruiting
RSV vaccine safety registry for pregnant people
This registry follows pregnant people who received an RSV vaccine during a specific window (32 to 36 weeks) to monitor safety. If you got the shot in that time, your information helps researchers understand how well the vaccine works in pregnancy.
Wilmington, North CarolinaAges 18–50 - NCT07769983Enrolling by invitationPhase 1
HIV vaccine study for people on effective treatment
This study tests a new vaccine designed to help your immune system fight HIV better. It is for people with HIV who are already on effective antiretroviral therapy and have a well-controlled virus. The goal is to see if the vaccine is safe and boosts your body's natural defenses.
Bern, Canton of BernAges 18 years+ - NCT07762014RecruitingPhase 2
A new vaccine for respiratory infections in adults 60 and older
This trial tests a new vaccine designed to help protect older adults from infections that can affect breathing. You might be able to join if you're in generally good health and meet the other requirements listed below.
AthensAges 60 years+ - NCT04166006RecruitingPhase 2
Vaccine made from your tumor cells after surgery for rare cancers
This trial tests a personalized vaccine made from your own tumor material, aiming to lower the chance cancer returns after surgery. It is for people whose rare cancers have been removed completely and who have no standard treatment available after surgery.
Meldola, FCAges 18 years+ - NCT07710872RecruitingPhase 3
Meningitis vaccine study for infants and toddlers
This study tests an experimental vaccine to protect babies and toddlers from meningitis (a serious infection of the brain and spinal cord). It checks how well the vaccine works and how safe it is in young children.
JingxiAges 2 months–1.9 years
Hear when a new Vaccination trial opens
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Common questions
- Are there clinical trials for vaccination?
- Yes. Clin2 currently lists 575 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.