He did. He had to have wanted there to be a cure to even consider taking Ellie all the way there to begin with. It couldn't have just been because she'd been so desperate for one herself. To have her life mean something.

"No, he did. He fought like hell to get me to the people who could have done it, but turns out, making a cure would kill me in the process."

Something in the brain. Ellie seems rather nonchalant about that part, though.

"So, he stopped them."