Clinical trials
General Population (no Specific Condition or Disease) clinical trials
Below are recruiting general population (no specific condition or disease) clinical trials, each written for real people, not researchers. We’re tracking 10,813 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT00404560Recruiting
Blood tests to study infection risk and immune problems
This study looks at how the immune system works in people who have—or might have—an increased risk of infections. It also enrolls their healthy blood relatives so researchers can compare immune features; results may help doctors understand who is at higher risk and why.
Bethesda, MarylandAges 1 month–100 years - NCT00428987Recruiting
Study of body and behavior traits in weight groups
This study looks at how physical traits and everyday behaviors differ among people who are overweight, obese, or in the normal-weight range. It may help researchers better understand risk factors related to weight and health.
Bethesda, MarylandAges 18–100 - NCT00001372Recruiting
Understanding Lupus: Research Study at NIH
This research study aims to better understand systemic lupus erythematosus (SLE), an autoimmune disease where the body's immune system attacks its own tissues. Researchers will evaluate patients with lupus, study genetic factors, and perform optional imaging tests to learn how the disease affects blood vessels and the heart.
Bethesda, MarylandAges 3–120 - NCT00138931Recruiting
Study genetics of inherited heart and muscle conditions
This study looks at genetic causes of inherited heart (cardiovascular) and muscle/nerve (neuromuscular) conditions. You may be asked about your family history and possibly genetic samples to help connect symptoms to specific genetic changes.
Chicago, IllinoisAges Any age - NCT02037867Recruiting
Study your liver blood markers if you’re at risk
This study looks at how certain blood tests (liver biomarkers) change in people with higher risk for liver disease. It may help doctors understand who is developing liver problems earlier and what patterns in blood tests matter most.
Nottingham, NottsAges 18 years+ - NCT01802034Recruiting
Study kidney samples to understand autoimmune, inflammatory, and diabetic disease
This trial collects and studies kidney tissue samples to better understand what drives kidney problems linked to autoimmune, inflammation, and diabetes. Your participation may help researchers develop better ways to diagnose and treat these conditions.
New York, New YorkAges 18 years+ - NCT00131014Recruiting
Building a family tumor and genetics bank for blood cancers
This study collects and stores tumor/tissue information and family medical history from people with certain blood cancers. It aims to help researchers understand why these illnesses may run in families and use genetic clues for future research.
Boston, MassachusettsAges 18 years+ - NCT00951366Recruiting
Preterm lung patient registry for former preterm infants
This registry collects health information from people who were born preterm. It helps doctors better understand lung problems that can occur after preterm birth.
Boston, MassachusettsAges Any age - NCT01515605Recruiting
Monitoring gene and molecular changes after kidney transplant
This study checks samples from people after a kidney transplant to better understand how treatment is working at a biological (molecular) level. It may help doctors improve follow-up care and therapy over time.
Odense, DKAges 18 years+ - NCT00237315Recruiting
Long-term study of urea cycle disorders in affected families
This study follows people with urea cycle disorders (and some people who are very likely to have one) over time. It aims to better understand how these rare enzyme problems affect health, using medical tests and family information.
Los Angeles, CaliforniaAges Any age - NCT00001276Recruiting
Understanding and Treating Severe Low Blood Sugar
This study helps doctors diagnose and treat dangerously low blood sugar, especially in people with pancreatic tumors that produce too much insulin. You'll receive comprehensive evaluation and personalized care to manage your condition.
Bethesda, MarylandAges 18–120 - NCT02038660Recruiting
Drug-coated balloon treatment registry for narrowed blood vessels
This study records outcomes for people who get a drug-coated balloon used to treat a narrowed blood vessel after a first balloon treatment. It may help doctors understand how well this approach works in everyday care and for different patient needs.
Bucheon-siAges 20 years+ - NCT00029445Recruiting
Blood and Cell Collection Study for HIV Research
This research study collects blood cells from adults with HIV and their family members to understand why some people's immune systems control HIV better than others. Researchers will use your cells to study HIV immunity and develop better treatments.
Bethesda, MarylandAges 18–100 - NCT01311258Recruiting
Tracking leftover cancer cells in AML or high-risk MDS
This study checks for “minimal residual disease,” meaning tiny numbers of leukemia cells that can remain after treatment. Results may help doctors better monitor your response and risk of relapse in AML or high-risk MDS.
Rochester, New YorkAges 18 years+ - NCT00001316Recruiting
Study viral levels in blood and lymph node tissue with HIV
This study measures how much HIV is in your blood and lymph node tissue. If you qualify, you would also allow blood and other tests (including genetic and hepatitis screening), which may help researchers better understand how HIV affects the body.
Bethesda, MarylandAges 18–100 - NCT01209000Recruiting
Study for children with new kidney protein loss
This study is for children (and some newly diagnosed patients) who have nephrotic syndrome—kidneys leaking a lot of protein. It aims to better understand the kidney condition (sometimes using biopsy) and support future care decisions.
Los Angeles, CaliforniaAges Up to 80 years - NCT00001987Recruiting
Understanding genetics of insulin resistance and diabetes
This research study looks at the genes and immune system factors that cause severe insulin resistance—a condition where the body doesn't respond well to insulin. Researchers want to understand why some people develop this problem and study family members and healthy volunteers to learn more.
Bethesda, MarylandAges 6 months–120 years - NCT00001350Recruiting
Understanding Autoimmune Lymphoproliferative Syndrome
This research study helps doctors understand ALPS, a rare immune disorder that causes swollen lymph nodes and spleen. Participating means providing blood samples and health information so researchers can learn how the condition develops and how to better care for patients.
Bethesda, MarylandAges Up to 99 years - NCT00001352Recruiting
Understanding Why Some People Get Fungal Infections
This study looks at genetic reasons why some people are susceptible to a serious fungal infection called cryptococcosis. Researchers will collect blood samples and perform genetic testing to understand the immune system differences that make certain individuals more vulnerable to this infection.
Bethesda, MarylandAges 18–99 - NCT00001645Recruiting
Evaluation and treatment of parasitic infections
This study evaluates and treats patients who may have a parasitic infection (an infection caused by parasites—tiny organisms that live in or on the body). Researchers will monitor your condition and provide care to help you get better.
Bethesda, MarylandAges 3 years+ - NCT02060695Recruiting
Study links Parkinson symptom ups and downs over time
This study looks at how changes in movement symptoms and non-movement symptoms happen together in people with early Parkinson disease. It may help doctors better understand what triggers symptom “ups and downs” and how to time treatment or monitoring.
SeoulAges Any age - NCT00001355Recruiting
Understanding immune system cell defects and family patterns
This research study investigates problems with immune system cells called phagocytes that help fight infections. Researchers will study patients with suspected immune defects and their blood relatives to better understand these conditions and develop better care.
Bethesda, MarylandAges 1 month–100 years - NCT01222741Recruiting
Study of people with higher risk of fungal infections
This study looks at immune system differences that can make some people get unusual or frequent fungal (fungus) infections. It may help researchers better understand these conditions, and you may be asked to store blood for future research.
Bethesda, MarylandAges 18–85 - NCT00789009Recruiting
Monitoring people with known or suspected HIV infection
This study tests how well researchers can track HIV-related health and immune changes over time by collecting blood and other samples. It may help you and your care team by creating detailed monitoring, even if your HIV diagnosis is new or still being evaluated.
Bethesda, MarylandAges 18 years+
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Common questions
- Are there clinical trials for general population (no specific condition or disease)?
- Yes. Clin2 currently lists 10,813 recruiting general population (no specific condition or disease) 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 general population (no specific condition or disease) 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 general population (no specific condition or disease) 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.