What is the primary purpose of medical research involving human subjects?

The primary purpose of medical research involving human subjects is to understand disease causes and enhance interventions. This goal is foundational to the field of medicine, as it focuses on generating knowledge that can lead to improved health outcomes for individuals and populations. By studying human subjects, researchers aim to explore underlying mechanisms of diseases, assess the effectiveness and safety of treatments, and ultimately contribute to the advancement of medical practice.

Research based on human subjects helps identify risk factors, treatment effects, and the overall impact of different medical interventions, which can lead to better diagnostic tools, therapies, and preventive measures. The insights gained from such research are crucial for informing clinical guidelines, policy decisions, and public health strategies that directly benefit patients and society.

In contrast, the other options, while they may involve aspects of medical research or related activities, do not capture the core objective of using human subjects in research. The focus on developing businesses or evaluating financial feasibility does not align with the ethical and scientific motivations that drive medical research aimed at benefiting human health.