Could there be zombies?

In Africa there is a disease called nodding disease, this disease has spread over more than three thousand children in Africa. The disease causes the children to sit and nod but can make them do even more weirder things like seizures and to wander off. More than two hundred deaths have been caused by this disease. Parents have to tie up their children to stop them from wandering off, the children chew on there lead trying to get away. People think this could be the start of a zombie apocalypse.