...The virus has three stages. Three... types. In the first stage, people just look like they're getting the flu. Second stage, they gut crazy and super strong. I could deal with both of those, just knock them out. Put them somewhere to wait to get better, right? Or just... run.

[And then he licks his lips.]

But... the final one. In the final one, Katara, people are falling apart. They're dead, Katara. You can see it in their eyes, and I saw- their organs are liquid. But they're still walking, still trying to kill us or infect us or whatever they want to do.

[And he bites his lip, inhaling, before he speaks again-] And... And those ones get up, even after they're down. Even when you break their bones. Even fatal wounds. I was guarding the hospital, I couldn't afford to lose.

[And he breathes one more time before-]

So when they were down... when they were what should be called "dead" - I burned the bodies, to make sure they wouldn't get up again.