The caduceus, right, is a winged rod with a pair of entwined snakes. The rod of Asclepius is a rod with no wings and a single snake
https://sb-dadscool.b-cdn.net/media_attachments/files/111/098/645/333/501/747/original/b52d98c257987eee.png
I learned recently the caduceus (left) and the rod of Asclepius are different symbols with different meanings. The staff with one snake was historically used by healers, and the caduceus, as a symbol of Mercury (notably not a doctor) was associated with merchants
Basically the USA got it wrong. But it is appropriate we got a symbol for commerce and a symbol for healing mixed up
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