Which symbol was incorrectly adopted as the primary emblem of medicine in the United States in the early 20th century and continues to be widely used despite not being the historically accurate medical symbol?

The healthcare industry is filled with rich symbolism that has evolved over centuries. One of the most recognizable symbols in medicine today has an interesting history of adoption and meaning. Test your knowledge about the evolution of medical brand identity with this trivia question about a symbol that appears on countless medical products, institutions, and services worldwide.

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The Caduceus (staff with two snakes and wings)
The Rod of Asclepius (staff with a single snake)
The Red Cross symbol
The Bowl of Hygieia (cup with a snake)