The user is not only immune to parasitic infection, but can also reject infestation by parasites and evict them from their bodies. Alternatively, they can also expel parasitic entities from the bodies of others.
In some cases, the user's body is in itself harmful to any parasite who tries to infect them, causing them pain and killing them outright.
Tretij Rebenok/Psycho Mantis (Metal Gear Solid V: The Phantom Pain)
Samus Aran (Metroid Fusion)
Splinter (Teenage Mutant Ninja Turtles 2012)
Gallery[]
When possessed by Baby, Trunks (Dragon Ball GT) was not only able to resist the control of the Tuffle parasite...
...but expel him from his body.
Thanks to his complete control over his body, Majin Buu (Dragon Ball series) is not only immune to Baby's Tuffle parasite eggs...
...but was able to expel one from his body.
The Anti-Venom symbiote's (Marvel Comics) skin is caustic to other symbiotes, allowing Eddie Brock to reject the Venom symbiote's attempts to bond with him again...
...burn and nearly separate it from Mac Gargan...
...and Flash Thompson to injure the Red Goblin with a mere touch.
Wolverine's (Marvel Comics) healing factor enables him to expel a Brood egg from his body.
Carmilla Black's (Marvel Comics) body is so fatally toxic that within seconds of covering her, a symbiote is rejected and dies.
Tretij Rebenok/Psycho Mantis (Metal Gear Solid V: The Phantom Pain) telekinetically extracting vocal cord parasites from Eli/Liquid Snake's body, saving his life.
After being treated by the Metroid vaccine, Samus Aran (Metroid Fusion) gained the ability to reject X-Parasite infection, absorbing them by physical contact.