[He nods...and then curses himself a little. Rosita had told him, not Carver, but...]

Not much, if I'm honest. It's an Earth, one with zombies but it's like a...sickness? It's less the dead given energy in the flesh without a soul and more like the body not realizing it's meant to rest at the end. Like the energy never got a chance to leave.

And it's in all of you, back home at least, and been that way for a number of years.