The Zombie apocalypse can be reversed?

(I moved the entire story onto here so enjoy)
3 years ago scientists had discovered a way to bring humans back to life, a cure they preached. A breakthrough of the 21 century they claimed. The best discovery ever to be made.Anything dead for more than 10 years couldn't come back, as in it would only be a skeleton. The scientists made a serum that could make animal skeletons animate again but they quickly shut that down, too many people got freaked out about the walking skeletons.Those who were given the cure turned into what we call zombrights. The reasoning for their name is because they are very smart and they are tactical, but only for hunting. Weapons can't destroy them, not even bombs. The limbs would move on their own accord.The zombrights will also each each other until there is nothing left. This was 2 years ago. Things haven't changed much. 5 months ago Australia got invaded. I do not know if anyone survived through that. I do know they were the only place where their government hadn't fallen. They were the last to fall because they refused the serum to be legal, they had enough problems with all their living creatures, the leader had claimed. Now it is 2015 and the survivors are still trying to find a way to fight what the scientists left us. Instincts are everything.