Illness and health are terms open to interpretation. Their meaning depends on cultural backgrounds, societal designations and historical change. During the modern era, having been shaped by natural sciences, knowledge in medicine has grown exponentially. However, critical voices warn of a medicalization of the image of humanity or an "absolutization" of health. They emphasize that limits must be set to medical progress. In return it has to be highlighted that contemporary medicine has opened up new chances of therapy, prevention and palliative treatment (pain relief), which could not be applied previously. As a result, it is the responsibility of medicine to make available the highest possible measure of progress to patients. The medical profession is confronted with the task of supporting patients in their right to self-determination and their decision competence. For the individual human being, health is a fundamental good. Therefore, each human individual has the right to health protection and medical care which correspond to the latest medical knowledge available. By now, this right has been acknowledged by human rights conventions and numerous legal documents. From an ethical point of view, health protection has to be interpreted as 1) the right to defense, 2) the right to claim and 3) the patient's right to participate. It falls to medical ethics to substantiate the meaning of health protection for the different spheres of medical activity.