Onset is a research area that focuses on the early stages or initial development of various conditions, diseases, or disorders. This can include studying the factors that contribute to the onset of a particular illness, as well as identifying potential warning signs or markers that may indicate an individual is at risk for developing a certain condition. Researchers in this field may explore genetic, environmental, lifestyle, and other factors that play a role in the onset of diseases such as cancer, Alzheimer's disease, diabetes, and mental health disorders. Understanding the onset of these conditions can help researchers develop preventive strategies, early detection methods, and targeted interventions to improve health outcomes.