Caduceus
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About the caduceus
This staff with wings and a pair of snakes twined round it is the caduceus of Hermes, messenger of the Greek gods and patron of merchants and travellers. Its use as a medical badge in the United States owes much to the US Army Medical Department, which adopted it in 1902.
Medicine’s traditional symbol is the rod of Asclepius ⚕, with one snake and no wings.