"I know, right?" Leon throws up his hands and sits back, shaking his head. He's so glad River seems to get it.

"Like I said, it was engineered as a bioweapon. Don't know whose bright idea it was to start, but the ones responsible for funding it and putting it into production were a corporation called Umbrella. They were gonna sell it as a means of clearing out enemy cities from one hand and distribute vaccines to the terrified populace from the other. Didn't exactly work out for them, though."