The user is immune to the acquisition of medical ailments, meaning that they cannot develop medical ailments of any kind, be they disorders, disabilities, diseases, etc.
If the user gains this ability after birth, then the ability can also heal any and all medical ailments, disorders, disabilities, diseases, birth defects such as heredity illnesses, unformed limbs, etc.
- Users can be harmed through other means of which are not medical.
- Hypercognitive Alphas (Alphas)
- Stanton Parish
- Yujiro Hanma (Baki the Grappler)
- Ravager (DC Comics)
- Slade Wilson/Deathstroke (DC Comics)
- Immortals (Highlander)
- Immortals (Highlander: The Search for Vengeance)
- Colin Macleod
- Marcus Octavius
- Wade Wilson/Deadpool (Marvel Comics)
- Steven Rogers/Captain America (Marvel Comics)
- Steven Rogers/Captain America (Ultimate Marvel)
- Thor Odinson (Marvel Comics)
- Patriot (Marvel Comics)
- Victor Creed/Sabretooth (Marvel Comics)
- Laura Kinney/X-23 (Marvel Comics)
- Super-Soldier Serum (Marvel Comics)