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Mole rat disease is a potentially permanent effect the player character obtains if bitten by an infected mole rat in Vault 81.


The effect is -10 Max HP, or permanently lowers the Sole Survivor's level by 1. During the quest Hole in the Wall, one will obtain the only dose of the cure available. If the player character has contracted the disease, they must choose between curing themselves or Austin Engill, an infected child.

Related quests


On PC, the condition can be removed by spawning an additional cure via console command player.additem 00055f10, by directly removing the effect via player.dispel 00249690, or by removing all current buffs and debuffs using player.dispelallspells. A Vault 81 Molerat Disease perk is displayed in the Pip-Boy, but this perk has no effect. To remove the perk, use player.removeperk 0023aec1.


Mole rat disease appears only in Fallout 4.


  • PCPC Playstation 4Playstation 4 Xbox OneXbox One It is possible to contract the virus without being bitten by a mole rat. This can be caused by a companion or the sentinel AI power armorCreation Club killing a molerat.[verified]
  • PCPC Playstation 4Playstation 4 Xbox OneXbox One If the dormant Protectron is activated and bitten, the Sole Survivor will contract the disease.[verified]