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 10,548 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT00001205Recruiting
Understanding neurocysticercosis outcomes in treated patients
This study follows patients who have been treated for neurocysticercosis—a brain infection caused by a parasite—to learn how they recover over time and what long-term effects they experience. By joining, you'll help doctors better understand this condition and improve care for future patients.
Bethesda, MarylandAges 3–99 - 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 - NCT00102544Enrolling by invitation
Tracking Devices to Find Abnormalities During Medical Procedures
This study tests technology that uses imaging scans to help doctors locate and reach abnormalities during surgical or interventional procedures. The goal is to make these image-guided procedures more accurate and safer for patients.
Bethesda, MarylandAges 18–120 - NCT01145196Recruiting
Study drug eye damage and genes in Plaquenil users
This study looks at how Plaquenil (hydroxychloroquine) can harm the retina (the eye’s light-sensing layer) and whether genetics affect who gets affected. You may help by sharing medical details and providing an eye-related blood sample so researchers can compare gene patterns to eye findings.
Bethesda, MarylandAges 18–120 - NCT00471250Recruiting
Lung fluid and tissue sample collection for research
This study collects samples from your lungs and airways to help researchers better understand lung diseases. It is not a treatment study, but your participation could help improve future care for people with lung conditions.
Bethesda, MarylandAges 5–100 - 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 - 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+ - NCT00943514Recruiting
Study of bronchiectasis and why infections keep coming back
This study follows children (age 5+) and adults with bronchiectasis or ongoing/repeated lung infections to learn what makes infections more likely. It mainly looks at non–cystic fibrosis causes, but may include some related conditions to compare differences.
Bethesda, MarylandAges 5–100 - NCT01011712Recruiting
Study immune causes of severe viral infections
This study looks at why some people have severe or unusual viral infections, even when they do not have a known immune problem. It collects blood and tissue samples to better understand possible inherited immune issues and may help future diagnosis and treatment.
Bethesda, MarylandAges 2–100 - NCT00646022Recruiting
Family study of small intestine carcinoid tumors
This is a research study that follows families with small intestine carcinoid tumors (and related hormone-related tumors) to learn how these conditions progress over time. It may help doctors better predict risk and health needs for people in similar families.
Bethesda, MarylandAges 18–100 - NCT01109420Recruiting
Family study of non-medullary thyroid cancer and genetics
This study looks at families affected by non-medullary thyroid cancer to understand patterns and possible genetic risk. You may be able to join even if you personally do not have the cancer, as long as you have the right family history and can complete a questionnaire.
Bethesda, MarylandAges 7–90 - NCT00339287Recruiting
Healthy adults donate blood to study bacteria-fighting cells
This study looks at how a person’s immune cells interact with bacterial germs. You’d be screened as healthy and may donate blood (and possibly tissue), with samples stored for future research.
Hamilton, MontanaAges 18–120 - 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 - 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 - NCT00006518Recruiting
Tissue samples from people with viral infections or cancer
This study collects tissue and blood samples from people who have or have been exposed to certain viruses (HIV, KSHV, HPV, EBV, or HTLV-1) or who have developed cancer or precancerous skin lesions. The samples help researchers understand how these viruses may lead to cancer.
Bethesda, MarylandAges 18–120 - NCT00655096Recruiting
Eye disease study screening for participants and family controls
This trial is a general screening step for people who may have an eye (ocular) condition, or for family members of someone with an eye condition. The goal is to help match you to an eye research study by confirming your situation and whether you can safely participate.
Bethesda, MarylandAges 2–100 - NCT00067054Recruiting
Collecting blood and samples for research
This study collects blood and other samples from healthy volunteers, children, and people with infectious diseases to help advance research. If you join, you may donate blood, urine, or skin samples that will be stored and used in future studies.
Bethesda, MarylandAges 3 years+ - NCT00001244Recruiting
Studying Immune System Disorders and Family Genetics
This research study examines how the immune system malfunctions in patients with common variable immunodeficiency (CVID)—a condition where the body doesn't make enough antibodies to fight infections. Researchers want to understand the genetics and immune patterns to help develop better treatments. Family members may also be asked to participate to help identify genetic causes.
Bethesda, MarylandAges 2–120 - NCT00001351Enrolling by invitation
Long-term study of immune system disorders
This study evaluates and follows patients with inflammatory conditions related to immune system problems. It aims to understand these disorders better and may offer opportunities to participate in other research.
Bethesda, MarylandAges 2 years+ - NCT00001532Recruiting
How Genes Affect Lung Disease Development
This research study examines how genetic factors contribute to various lung diseases, including alpha-1 antitrypsin deficiency, cystic fibrosis, and chronic obstructive pulmonary disease. Researchers want to understand why some people develop lung disease and how genetics plays a role, which may help improve treatment in the future.
Bethesda, MarylandAges 2–90 - NCT00867269Recruiting
Study of causes and progression of low CD4 blood cells
This study looks for what causes and how idiopathic low CD4 cells happen over time, using blood and tissue samples. It may help doctors learn why this occurs and how to better track people with it.
Bethesda, MarylandAges 18 years+ - 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 - 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 - NCT00001160Recruiting
Study of thyroid lumps and thyroid cancer
This study looks at people who have or may have thyroid nodules (lumps in the thyroid gland in your neck) or thyroid cancer, as well as family members who may have inherited a higher risk. It aims to better understand and diagnose these thyroid problems.
Bethesda, MarylandAges 6 months–98 years
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Common questions
- Are there clinical trials for general population (no specific condition or disease)?
- Yes. Clin2 currently lists 10,548 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.