Minecraft wiki entry for Villager, associated text: Both zombies and drowned either kill villagers or convert them to zombie villagers. The chance of the villager becoming a zombie villager upon death is 0% on Easy, 50% on Normal, and 100% on Hard. Baby villagers can be infected by zombies as well. Drowned are able to convert villagers to zombie villagers, even when attacking with a trident from a distance.