Candy Zombie flesh is highly contagious. It will turn one into a zombie if consumed. Princess Bubblegum experimented on this flesh in "From Bad to Worse," but Cinnamon Bun ate the flesh and turned into a zombie. But in "Slumber Party Panic," other Candy People ate Candy Zombie "insides" and didn't get infected. This is most likely due to the fact that the insides of the Candy Zombies are not infectious.