Minecraft wiki entry for Zombified_Piglin, associated text: Zombified piglins can also spawn if a piglin or a piglin brute enters the overworld or the end. The piglin or piglin brute turns into a zombified piglin after fifteen seconds after the piglin or piglin brute enters and gets the nausea effect. Piglins or piglin brutes that are zombified has the same amount of damage output as a normal zombified piglin. They also get the same health as a normal zombified piglin. Piglins or piglin brutes that are zombified cannot turn back to a piglin or piglin brute, meaning once a piglin or a piglin brute is zombified, it stays zombified until killed or despawned.