Clinical research studies the safety and effectiveness of new medical treatments, drugs, devices, or interventions in humans. It involves carefully designed studies conducted with volunteer participants to gather data on the potential benefits and risks of these interventions. Clinical research is essential for advancing medical knowledge, improving patient care, developing new treatments for diseases and health condition, and contributing to the prevention, diagnosis, and treatment of diseases and health conditions. 

Two main types of clinical research studies are observational studies and interventional studies. Observational studies observe participants in their natural environment or during routine medical care to gather information about their health outcomes. Interventional studies, also known as clinical trials, these studies involve the administration of a specific intervention (such as a new drug, treatment, or medical device) to evaluate its effects on participants' health outcomes.