Rod of Daisyus

A keychain or amulet for the Best nurse I've ever met besides my Mom.
A tongue in cheek homage to the god Asklēpiós and to ward off all type of disease.
No protection from Delight Dementia though because she causes that.

The rod is borrowed from Hysteresis' Star of Life, Medical Symbol -
https://www.thingiverse.com/thing:2459254

Add a metal split ring for keys or attach to a book bag zipper.
You could attach a chain to the heart to hang around the neck of a health care worker named Daisy or even or a nice Latina named Margarita.