People with the same diagnosis typically receive a standard treatment that is not necessarily effective for everyone. With knowledge of the individual patient's genome, it may be possible in the future to a greater extent to target the medical treatment to fit with the patient's genetic characteristics. Genetic information can thus contribute to more personalised—or customised—medicine. This is not done systematically today, partly because we have an incomplete understanding of the connection between our genetic material, the disease and the response to treatment.