Mole rat disease

Mole rat disease is a permanent effect the player obtains if bitten by an infected mole rat in Vault 81 during the quest Hole in the Wall. The effect is -10 Max HP. During the quest, the Sole Survivor will obtain the only dose of the cure available. The player then must choose to either save the life of Austin Engill, a young boy who was bitten by an infected mole rat himself, or use the cure on themselves. If the Sole Survivor cures Austin of Mole rat disease, he/she will gain the favor of the vault as well as a room to stay in.

Although there is no second cure, on a PC the player can obtain an extra via the console command "player.additem 00055F10". On consoles there is an exploit that allows you to trick the game into thinking you have given the boy the cure. Simply tell the doctor you are keeping the cure for yourself. Then, while the dialogue option to say "You're Right" is available, simply use the cure before choosing it. You will be cured and everyone will react as if you've chosen to cure Austin.