Disease

A disease is defined by pathology as a deviation from normal physiological function, resulting in impairments to structure or process within a biological system. The condition arises from an underlying etiology, which is the cause, and progresses through pathogenesis, the mechanisms by which the condition develops. These deviations can stem from genetic anomalies, environmental toxins, infectious agents, or dysregulation of metabolic processes. Scientific study focuses on understanding the biological mechanisms—such as immune response failures, cell damage, or molecular imbalances—that characterize the ailment, leading to the classification of conditions based on their observable symptoms and underlying biological basis.