Hyperimmune

Hyperimmune is notable for being one of the only mutations that give a bonus to Endurance that isn't completely game changing (the other being Ultraclotte).

Location

Hyperimmune is located deep in the Subway Tunnels, and can be difficult to obtain. The area is swamped by stronger than average zombies, as well as a sickness that drains your health until you reach the location and mutate, so you'll have to move quickly. Be prepared to climb, scavenge, and use your brain to solve a few simple puzzles.

Effects

This mutation grants:

    +2 to Endurance
    Immunity to disease
    50% resistance to rad sickness
    Reduces the effectiveness of nanites by 60%

Advantages

If no longer being susceptible to disease/sickness isn't good enough, you're also immune to vampirism and zombie rot. It's also needed to effectively wear the deathsuit, one of the best armors in the game.

Disadvantages

Taking it does have is downsides though, you can not become a Vampire, or Zombie, if you were planning of going that route. Also nanite healers don't work so well, which is a pretty bad thing if you don't have a decent medic skill.

Appearance

None