Disease modification refers to a therapeutic approach that aims to slow down or halt the progression of a disease, rather than just treating its symptoms. This can be achieved through various methods such as modifying gene expression, altering cellular processes, or targeting specific molecular pathways involved in the disease's development and progression. The goal is to prevent or reduce the severity of the disease by addressing its underlying causes, rather than just treating the symptoms. This approach can be used for a wide range of diseases, including genetic disorders, chronic conditions, and autoimmune diseases.