A clinical trial is a research study that evaluates the safety and effectiveness of new medical treatments, interventions, or medical devices in humans. These trials are typically conducted in phases, starting with small groups of participants and expanding to larger populations as the treatment is tested for efficacy and safety. Clinical trials are essential for advancing medical knowledge and improving patient care by determining whether new treatments are safe and effective for a particular condition. Participants in clinical trials are closely monitored by medical professionals to ensure their safety and well-being throughout the study.