The goals of medicine are to promote Health, to preserve health, to restore health when it is impaired, and to minimize suffering and distress. These goals are embodied in the word "prevention". Actions aimed at eradicating, eliminating or minimizing the impact of Disease and disability, or if none of these are feasible, retarding the progress of the disease and disability. The concept of Prevention is best defined in the context of levels, traditionally called primary, secondary and tertiary prevention. A fourth level, called primordial prevention, was later added.