A Rod of Asclepius is a popular medical symbol.
According to the legend, the ancient Greek God of medicine Asclepius went with a rod to the Palace of the Cretan king Minos, who called him to resurrect his dead son. On the way, the serpent encircled the rod, and Asklepius killed it. Then there was a second snake, with grass in the mouth, this snake revived the first snake. Asclepius found this grass and with its help began to resurrect the dead.
The Rod of Asclepius was usually depicted as a wooden stick with branches and symbolized the connection with the earth and the doctor's wanderings.