I guess we all have to die of something
The question I am about to ask is not meant to be insulting. Just to get that out of the way first!
How does one tell the difference between a normally occurring fiber, and a morgs fiber? Strangely enough I have been seeing them floating around me and on me (never stuck in me though). They mostly appear to be inanimate, but sometimes I'll get one that seems to react to say poking a finger at it (it will move towards it). I've always chalked that up to the static charge of my body. (I swear that how these things get to us!)