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The original association between the snake and medicine is from the Greek god of healing, Asclepius. I put an image of the "Rod of Asclepius" below. However, the Rod of Asclepius became confused with the symbol of another Greek god, the Caduceus of Hermes (also pictured below). The Caduceus has been used as the symbol of medicine in the U.S. since the late ...


I would assume it has a biblical origin. In Numbers chapter 21 a copper snake was placed on a banner for all the Israelites who were bitten by snakes to look at so they wouldn't die. In fact most snakes you see on medical pictures have it wrapped around a pole.

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