The Zombie Doctor achievement in Minecraft is awarded to players who cure a zombie villager back into a regular villager. Zombie villagers are villager mobs that were infected by a zombie.

Zombies are a constant menace in Minecraft no matter what version you’re on — these undead enemies spawn in the darkness and they’re ready to pass on their curse to any unsuspecting ...

Saving a zombie villager from its disease earns players the achievement of “Zombie Doctor.” On top of this, the newly healthy villager will offer excellent trades to the gamer who cured it.