Clinical research is defined as scientific studies or investigations conducted on human subjects to assess the safety, efficacy, and effectiveness of medical interventions, therapies, medications, technologies, diagnostic instruments, and healthcare delivery techniques. Clinical research seeks evidence-based knowledge to improve healthcare practices, support medical decision-making, advance medical science, and, eventually, improve patient outcomes. Diagnosis, on the other hand, is the process of detecting diseases, disorders, or health-related problems using clinical signs, symptoms, medical history, physical examination, and diagnostic tests or procedures. Clinical research is crucial in enhancing diagnostic methods and instruments by assessing the accuracy, reliability, and validity of diagnostic tests, developing new diagnostic technologies, and identifying biomarkers or indicators for disease detection and surveillance.