There's a great 😉 story behind that snake.
The snake is actually an african guinnea worm wrapped around a stick. The guinnea worm is a parasite that burrows out of your skin and releases offspring from it's terminal end. The terminal end sticks out. When our ancient ancestors saw these things sticking out of their skin they would try to pull them out. Unfortunately, the worm would rip and then dissappear again and regrow. The first doctors mastered a technique of wrapping the worm around a stick while slowly pulling the worm out. Thus, the origins of physical medicine.