And we are but carriers of it.
Phage is short for bacteriophage; it means bacteria eater. Phages can be beneficial by killing bacteria in wounds. On the other hand, they can also make other bacteria more dangerous.
Inspired by University of Minnesota, Duluth, University for Seniors class on micro-organisms., 2016-03-06
I thought of this phrase independently, but a Google search for "all the world is a phage" turned up many sites that had used this phrase long before I did.