Already in the 7th century B.C. it was clear that healing does not reduce itself to the limited medical and pharmacological practice we see today. Prevention in the sense of finding a good and healthy lifestyle needs to work hand in hand with cure. Evidence is shown in greek pictures where Asclepios was always in the company of his daughter Hygieia.
Asclepios was a God of medicine in ancient Greek religion and mythology. Until today the rod of Asclepius with the snake entangled around it is used as symbol for medicine.
One of his daughters would seldom leave his side. Her name was Hygieia, the Goddess of Health, cleanliness and sanitation. While her father was more directly associated with healing, she was associated with the prevention of sickness and the continuation of good health.
Nowadays in Germany this role is called "Präventologe". The topic of prevention and health promotion is gaining more and more attention also in the political healthcare arena.