"The initial onset of the disease was due to a tainted drug similar to LSD combined with an amped up energy drink, so I have to think that the disease has somehow tweaked the brain chemistry, but what the eating of brains is trying to replace, I hadn't figured out."

He'd been too busy trying to reverse engineer the cause of the disease so he could cure it, but without the ingredients, that's not happening. "I need a whole lab, which we don't have."