Andrea: You have no idea what it is, do you?

Edwin Jenner: It could be microbial, viral, parasitic, fungal.

Jacqui: Or the wrath of God?

Edwin Jenner: There is that.

Andrea: Somebody must know something. Somebody somewhere.

Carol: There are others, right? Other facilities?

Edwin Jenner: There may be some. People like me.

Rick Grimes: But you don't know? How can you not know?

Edwin Jenner: Everything went down. Communications, directives... all of it. I've been in the dark for almost a month.

Andrea: So it's not just here. There's nothing left anywhere? Nothing? That's what you're really saying, right?