Old Cure Edit
The old cure contained two pills - a nano pill and a nano-stopping pill. The nano pill contained nanos that reproduced and ate away at the lesions in the brain, while the nano-stopping pill at the nanos after they finished the job. The only two users of the old cure were Zane, who got the nano pill, and Tally, who got the nano-stopping pill
New Cure Edit
The new cure rewired the user's brain, bypassing the lesions.