A clinical trial tests a new medical approach in people to answer specific health questions while ensuring its safety for research volunteers.
Clinical trials follow strict scientific standards that protect participants and produce reliable study results.
Some clinical trials test new treatments and therapies, or new ways to use existing therapies. Some test new procedures or devices. Some are long-term studies examining how disease and health progress.
The number of participants in a clinical trial depends on its size and scope. Some enroll hundreds—or even thousands—of people while others may enroll only a few.