The Middle Ages, especially the early and middle ages, are perceived as a dark time of decline in scientific medical knowledge
The Medicine of Antiquity
The healer was a priest because, in the end, his appeal to the gods and how persuasive his appeal to them would be, depended on the health and life of the sick.
Interesting facts from the history of medicine
In Babylon, a mistake by a physician was very costly: the doctor’s hands were cut off for wrong treatment. Perhaps that is why there was a shortage of doctors in the Babylonian kingdom