With the widespread use of fully manifested Therians, Otherkin, and clockwork bioware enhanced humans during The Great Colonial War, the need for a special sort of field medical training was necessary.
This pin was worn by an empathic shaman nurse who specialized in locating wounded astral projectors who had been severed and were lost on the shadow battlefield, to help them find their way 'home'.
How can an astral projectionist be wounded?
And is the visual reference to the Biohazard symbol intended?