In a setting where humanity is being wiped out by ThePlague, there will sometimes be one person who is mysteriously immune to the disease. This could be due to some inborn genetic resistance to the disease, or it could be that they are unknowingly exposing themselves to the cure in the course of their daily life (particularly if the disease has an ImprobableAntidote). On occasion, especially in works that are short or CutShort, there is no explanation.

Discovering this immune character is often the key to finding a cure to the disease, with the main difficulties being getting them safely to the scientists who can develop a cure and figuring out what factor in their environment protected them. Another possibility is that developing the cure might require [[TheyWouldCutYouUp extreme measures]], leading to [[TheNeedsOfTheMany dramatic ethical dilemmas]] and making the immune character [[ScrewThisImOuttaHere unwilling to cooperate]].

The heroes will want to protect and study this character to find a cure and save mankind. A CorruptCorporateExecutive may want to kidnap them in order to monopolize the cure, and if TheGovernment is involved in the development of the cure, they will always seem almost creepily enthusiastic in going out of their way to find [[TheyWouldCutYouUp methods]] that will not only be highly lethal but also unnecessarily painful. If the disease was deliberately engineered by a villain, then they may want to hunt down and kill the Immune to prevent a cure from being developed.

In darker works, this character's immunity might not be able to be turned into a cure for others, in which case they can become TheAloner in an empty world AfterTheEnd. In really dark works, someone who had been the Immune ceases to be. Perhaps they were protected by environmental factors that were undermined before they were recognized.

If this character isn't affected by TheVirus but is still perfectly capable of spreading it to others, they may also play the role of TyphoidMary or PoisonousPerson. If the character was not human to begin with, HybridOverkillAvoidance may protect them from becoming a HybridMonster.

Note that this trope is completely different from the RealLife term "asymptomatic carrier" (that's TyphoidMary) - A person who is immune will not have the disease or virus in the body even if they contract it (and thus unable to spread the virus or disease), while a asymptomatic carrier will have the person will carrying the virus or disease in the body, but show no symptoms of the virus or disease (and have same potential to spread the virus or disease). However, these two concepts have been used interchangeably and often misused.

Compare IdealIllnessImmunity, a character or species that isn't just resistent to this one disease, but ''cannot'' get sick, ever.


[[folder:Anime & Manga]]
* In ''VisualNovel/HigurashiWhenTheyCry'', Rika. [[spoiler:She's immune to Hinamizawa Syndrome and medicine is derived from her blood.]]
* [[spoiler: Marco]] and [[spoiler: Zeus]] are immune to the Medusa Virus in ''Manga/KingOfThorn'' because [[spoiler:they are too confident in themselves for it to find a crack in their psyches to infect.]]
* This is part of the premise of ''Manga/DoubleArts'', in which the world has been decimated by a mysterious plague (a plague with no permanent cure). While there is a small percentage of [[AlwaysFemale young women]] who possess a tolerance to the disease, it is only the protagonist, a young man named Kiri Luchile, who is truly immune to its effects [[spoiler: and even has the capability to nullify the disease when it reaches its final stage; [[HealingHands by physically touching the infected person,]] Kiri can effectively halt the progression of the plague and stave off the infected person's death, but ''only'' so long as he holds on to them. This is a major plot point.]]
* In ''Anime/CasshernSins'', Casshern and Friender are the only ones who don't succumb to the Ruin, which causes the normally immortal robots to rust and decay much faster than in RealLife. Casshern is immune because he caused the Ruin and is apparently something along the lines of ThePunishment. The source of Friender's immunity isn't spelled out explicitly, but it's implied to have come from [[spoiler:eating some of Casshern's flesh]].
* In ''Manga/AnatoliaStory'', Yuri proves to be immune to the plague ravaging the Hittite Empire when she spends an extended amount of time tending to the sick. Given that she's from modern times, Yuri believes her vaccinations have granted her immunity, while the people of the ancient time period just take this as further proof that Yuri is blessed by the gods. (A bit of ArtisticLicense there: the historical plague that swept through Anatolia is generally agreed to have been tularemia, which is not a general vaccination and is only administered to high-risk groups due to dangerous side effects. Not to mention that one of the historical figures Yuri is based on, [[ Gassulawiya]], did die to the plague.)
* ''Manga/WorldsEndHarem'': Reito Mizuhara is immune to a virus that only targets males and has wiped them out of the face of earth in 2040 to 2045, the women theorizes that a combination of him contracting multiple sclerosis, going into cryostasis in hopes they would find a cure during his cold sleep, and consequent cure during said sleep made him immune to the virus; now possessing valuable genes that the women compete over to birth a new human race.

[[folder:Audio Play]]
* Saul and his mother Tanya from ''AudioPlay/WereAlive'' are believed to be immune to the [[ZombieApocalypse zombie outbreak]] after several close calls. This is pretty much confirmed in the final season when Saul is bitten directly on the neck by a zombie and doesn't turn. In the epilogue, many people believe that Saul and Lizzy's son, Nicolas, may also be immune, but he hasn't been exposed so it's unknown whether he is or not.

* The reason everybody was looking for Ray Palmer in ''ComicBook/CountdownToFinalCrisis''
* Also a plot point in Maximum Clonage arc of Franchise/SpiderMan, where one person survived the test run of the Jackal's virus
* The ''Franchise/{{Batman}}: Contagion'' story had a series of these, each typically revealing that there was one other person just before dying (and rendering the antibodies in their blood immediately useless).
* Yorick and Ampersand, the only males to survive the {{Gendercide}} in ''ComicBook/YTheLastMan''. [[spoiler: Or so they thought.]]
* In ''ComicBook/AllStarSuperman'', [[CasanovaWannabe Steve Lombard]] was immune to being turned into a Bizarro. He smugly asks Supes to scan him with his XRayVision and create the antidote, but Franchise/{{Superman}} answers, embarrassed, "I don't think I can recommend your performance enhancers to the rest of the population".

* Alice in ''Film/ResidentEvilExtinction''. It doesn't have any actual bearing on the plot, mind; it's just exposited by the White Queen at the end.
** Given Umbrella bonded her with the T-Virus at the end of ''Film/ResidentEvilApocalypse'', it makes sense that she is immune. She's ''already'' infected.
* The survivors of the plague in ''Film/{{Doomsday}}'', with Cally in particular serving the role of "make a cure from her blood".
* The protagonist of ''Film/IAmLegend'' is one of the few humans that are immune to the disease. He spend the next three years trying to synthesise a cure out of his blood for the humans that instead mutated into the feral Darkstalkers.
** In the Will Smith version he's not the only one, in every other adaptation he is the last uninfected human, ever.
* Not true immunity, but in ''Film/TwentyEightWeeksLater'' both the wife and the son are infected by the Rage Virus, but show no symptoms, instead becoming carriers. It's implied that it has something to do with the fact they have heterochromic eyes.
* In ''Skinwalkers'' the key to curing lycanthropy are the antigens in a half-werewolf, half-human boy's blood.
* Joanie in ''Warning Sign'' is immune to the bio-engineered HatePlague because she's the only pregnant woman in the quarantined facility; the special hormones in her blood is what keeps her safe and is the basis of the cure. WhatDoYouMeanItsNotSymbolic?
* In the SoBadItsGood movie ''Film/RobotMonster'', the only people who are left alive after the alien invasion are the friends and family of a middle aged scientist who'd dosed them all with a cure-all serum. (Initially though, the scientist thinks it's a protective electric barrier he erected that staved off the alien's attack.)
* In ''Film/{{Contagion}}'' Mitch Emhoff turns out to be naturally immune.
* The doctor's wife in ''Film/{{Blindness}}'' is the only one whose eyesight is retained in the mysterious blinding epidemic.
* Of the few surviving humans in ''Film/DawnOfThePlanetOfTheApes'', it's stated that most are immune to ALZ-113/Simian Flu.
** Though [[Film/WarForThePlanetOfTheApes the sequel]] reveals that they're only immune to the baseline simian flu not to a [[spoiler:mutated strain that robs humans [[TheSpeechless of speech]]]].

* The ''VideoGame/PerfectDark: Initial Vector'' novel.
* A big focus of ''Literature/TheAndromedaStrain'' was finding out why two people were immune to the disease when everyone else died
** What made it interesting was that they were [[spoiler:immune for similar, yet different reasons. The old man was an alcoholic, so his blood pH was acidic, and the baby was hyperventilating through crying, which made his blood pH alkaline. Turns out the Andromeda Strain could only survive within a narrow pH range]].
* In ''The Changeling Plague'', [=IdahoBlue=] was one of these for a previous disease epidemic (though not the titular one)
* In ''Chasm City'' of Creator/AlastairReynolds' [[Literature/RevelationSpaceSeries Revelation Space]] universe, the cure for the Melding Plague, called Dream Fuel, turns out to be blood harvested from an alien with natural immunity
* Dr. Robert Neville in virtually every adaptation of ''Literature/IAmLegend''.
* The thief in Brian Evenson's short story ''Fugue State'', who breaks into and loots quarantined apartments.
* José Saramago's ''Blindness'' follows the one woman immune to the plague of blindness.
* In ''Literature/OryxAndCrake'', Snowman aka Jimmy believes that he is the only human left in the world after a man-made hemorrhagic virus destroys humanity in a matter of weeks. He inadvertently gained immunity some time before the outbreak of the pandemic via a vaccine created by his friend [[MadScientist Crake]].
* Everyone who lives through the first act of ''Literature/TheStand''.
* Every character in George R. Stewart's ''Literature/EarthAbides'' is immune to the plague for one reason or another - which is only reasonable, since all the non-immunes die within the first few pages.
* In ''Literature/DiarioDeUnZombi'' Paula is immune to the zombie virus, a major plot point since finding out why can save the human race.
* In ''TheLordOfTheRings'', Tom Bombadil is the only being completely unaffected by the One Ring (it cannot even make him vanish when he puts it on his finger), implied to be because there is nothing he desires in the world that the Ring can tempt him with. The Council of Elrond considers giving the Ring into his keeping because of this, but the problem is that the very cause of this immunity means he wouldn't be a good guardian--he wouldn't be able to appreciate how important the Ring is and would casually toss it aside and forget about it.
** As Tom doesn't seem to fit anywhere into Middle-Earth's greater cosmology (only really becomes apparent if you read The Silmarillion, where the connectedness of everything else is laid out), it's possible that the Ring doesn't work on him because he is somehow ''outside'' its influence.
* In ''Literature/TheDeathCure'', it is revealed that most of the kids who were part of WICKED's Trials, along with a very small percentage of the world's population called [[ExactlyWhatItSaysontheTin "Immunes"]], are immune to the Flare. WICKED took them from their families because they wanted to study their brains in the hope that this would eventually lead to a cure. The few among them who are not immune were chosen as control subjects.
* In ''[[Literature/{{Divergent}} The Divergent Trilogy]]'', [[spoiler:Tris is able to resist serums, like most Divergents. She is notably able to fight off Candor's truth serum in ''Insurgent'', and cannot be killed by the Bureau's death serum in ''Allegiant''. At multiple points, it is mentioned that her ability to resist is beyond that of most Divergents]].
* In Scott Westerfeld's ''Literature/{{Peeps}}'' Carriers for some unknown reason get the benefits of the parasite that causes "vampirism" while still managing to remain sane. Night vision, super strength, and long lifespans without the urge to commit cannibalism (just a craving for rare meat and a high libido) or aversion to everything they loved before infection. Unfortunately they can transmit the parasite with as little as a kiss, those who work as hunters usually start out with their exes.
* In ''[[Literature/TheExpanse Cibola Burn]]'', an alien microbe blinds everyone on Ilus...except for Holden, who consequently ends up doing all the vision-critical jobs around the colony until a cure is found. [[spoiler:It turns out to be his anti-cancer drugs. When they ask if they can borrow his drugs to fix everyone else's vision, which puts him at risk of developing tumors, his response is essentially, "And then I can take a nap?"]]

* There was a ''Series/StarTrekVoyager'' episode where B'Elanna's unborn baby provided the cure to a Klingon disease
** And come to think of it, she was also the source of the cure for the Vidiian Phage
** Also from ''Series/StarTrekTheOriginalSeries'', Pavel Chekov in the episode "The Deadly Years." The landing party members age rapidly, except for him, which provides the key to discovering the ImprobableAntidote.
* ''{{Series/Heroes}}'': Mohinder's blood carries the cure for the Shanti virus
* A big plot point in the second season of ''Series/DarkAngel'' and the three follow-up novels. The BreedingCult plan to unleash a disease that only they will survive, but Max turns out to possess total immunity
* An episode of ''Series/TheXFiles'' dealt with an oil rig worker who was immune to the alien black oil.
* An episode of ''Series/TerminatorTheSarahConnorChronicles'' revolved around them having to save a woman who will be naturally immune to a disease Skynet engineers to wipe out the Resistance.
* In the BBC series ''{{Series/Survivors}}'' (the 2008 remake/"reimagining"), the last remnants of humanity are those who never caught the "European Flu" or who are naturally immune to it. Abby is the only person to ever develop symptoms but then recover, which causes her to get abducted in the season one finale.
* The ''Series/StargateSG1'' episode "The Broca Divide", where [[spoiler:Dr. Fraiser is immune to the virus due to the [[ImprobableAntidote strong antihistamines]] she takes for allergies]].
** Daniel Jackson was temporarily immune for the same reasons until he was trapped off-world and no longer had access to his medication.
* ''Series/TeenWolf'''s Lydia Martin is the only known person who is immune to the bite of a werewolf and the venom of a Kanima. The reason behind this is currently unknown, but it's implied to have something to do with her unexplained ability to sense the supernatural.
** As of Season 3, we know it's because [[spoiler: she is a Wailing Woman, otherwise known as a banshee]].
* Sam Winchester in ''Series/{{Supernatural}}'' is immune to the [[Recap/SupernaturalS02E09Croatoan Croatoan virus]].
* This is part of ''Series/{{The 100}}'''s backstory. When the nuclear bombs fell, certain people had a natural resistance to radiation, allowing them to survive while the rest of humanity died out. Their radiation immunity was passed on to their descendants, who became the Grounders.
* On ''Series/MyNameIsEarl'', the "Witch Lady" tried to [[SlippingAMickey drug Catalina's tea]], with the intent of storing her in the basement along with all the others she intended to kill [[DisproportionateRetribution for bullying her]]. Catalina gets down into the basement, but explains that she wasn't affected by the drug because [[FridgeHorror so many men have tried to slip her date-rape drugs in the past that she's immune to them]]. She then explains that she only pretended to be knocked out and allowed herself to be bagged and tossed in the basement is that she felt sorry for the Witch Lady.
* ''Series/TheLastShip'': Most of humanity dies out as a result of a SyntheticPlague, with the eponymous ship going on a mission to develop a cure. In the second season it becomes apparent that a lot more people have a natural immunity than previously thought (around 5% of the population). They start a cult that portrays them as the "chosen people" and set out to kill all non-immunes, led by two immune British brothers who were the only survivors of the nuclear submarine they both served in.

[[folder:Tabletop Games]]
* In ''TabletopGame/MagicTheGathering'', several members of the Mirran Resistance against New Phyrexia are immune to [[TheVirus Phyresis]], the most notable one being the Sylvok outcast Melira, who was born without any metal in her body, as most beings on Mirrodin were (and Phyresis affects metal).
* An expensive (and frequently banned) merit in TabletopGame/WerewolfTheApocalypse makes the character immune to contamination by Wyrm taint. The book notes that this will probably lead to some dangerous missions.
* One minor NPC in ''TabletopGame/{{Ravenloft}}'s'' domain of Dementlieu is a man who unknowingly inherited a ''ring of mind shielding''. The mind-controlling villain who secretly controls that nation is aware this man is immune to his powers, and is determined to find out why.
* In the post-apocalyptic "economic horror" RPG ''TabletopGame/RedMarkets'' some people are immune to the Blight that causes zombies, and others, called "latents", become carriers after being bitten and become zombies after dying for some other reason. Immunity or latency can be established at character creation or discovered after getting bitten and making a critical success or critical failure on the fort save, respectively.
** A drug called Suppressin K-7864 was produced by the DHQS from a mixture of immune marrow cells and antibiotics, it doesn't cure the Blight or prevent infection entirely, but instead turns the infectee latent. As a result Immune in the Recession under government control are subject to "medical conscription" for their cells and in the Loss cults like the Crusaders (who seek a cure) and the Holy Communion (who think the Immune are holy, and eat them) have a habit of claiming their own samples.

[[folder:Video Games]]
* As an AntiFrustrationFeature, this is ''usually'' the case with anything involving zombies or similar creatures in video games. There are games where you have to manage your infection level, but they tend to be rare (examples include ''VideoGame/{{Extermination}}'' or ''VideoGame/ResidentEvilOutbreak''.)
** It's used as a plot point in both ''VideoGame/DeadRising'' games. Some people are more resistant to the zombie virus than others; such resistants include [[spoiler:Frank West and Tyrone King]]. Chuck's apparent immunity, while unexplained, is a natural step up from that.
* In ''VideoGame/{{Infected}}'', the main character is not only immune against the zombies, but his/her blood is only thing (short of a nuke) that can kill the zombies. So a scientist makes a gun that shoots his/her blood at zombies, gives them a gun, and tells them to go clean up New York City.
* ''Franchise/{{Halo}}'':
** Sgt. Johnson was immune to infection by the Flood, either due to "Boren's Syndrome" caused by "overexposure to plasma grenade radiation", or [[spoiler:the ''real'' reason hidden by the previous cover-up - the chemicals that were used to augment Johnson into a Spartan-I]].
** Due to the physiology of Hunters (they're worm colonies with no central nervous systems), they are immune to direct Flood infection.
** In ''{{VideoGame/Halo 4}}'': [[spoiler:the Master Chief is exposed to the Libarian's memories, rendering him immune to the Composer.]]
* The survivors in ''VideoGame/Left4Dead''.
** Some of the graffiti in the second game and radio chatter near the Bridge Finale suggests [[spoiler:the survivors are [[ carriers]] of the Infection. [[ A supplementary comic]] explicitly explains that the immunity is genetic, and confirms the carrier part: "immunity" keeps people with it from turning, but they can still transmit the virus to others.]]
* Not so much a plague as a curse, but Adell in ''VideoGame/{{Disgaea 2|CursedMemories}}'' is the only one who doesn't turn demonic under Zenon's influence. [[spoiler:Turns out it was because Adell was a demon to begin with. He never discovers this himself, but it becomes quite obvious to the player.]]
** Carrying into [[VideoGame/Disgaea4APromiseUnforgotten the fourth game]], [[spoiler:Artina, a.k.a. ]]Vulcanus shows absolutely no signs of A-Virus corruption during Chapter 6, and took a shot meant for Valvatores at the end of Chapter 5. [[spoiler:The blood of angels like her is a panacea for all forms of disease, the A-Virus included. While Valvatores resists through sheer willpower, or so he claims, after winning Chapter 6, she issues blood samples to the demons both to treat the pandemic and simultaneously fill Celestia's coffers.]]
* The baby in ''The Pitt'' {{DLC}} of ''VideoGame/{{Fallout 3}}'' is immune to harmful mutations caused by nuclear radiation. She is also resistant to 'Troglodyte Degeneration Contagion', a condition caused by radiation and industrial toxins that turns humans into sub-human monsters.
* [[spoiler: Tsugumi]] of ''VisualNovel/{{Ever17}}'', whose blood provides the cure for Tief Blau.
* Samus in ''VideoGame/MetroidFusion'' becomes immune to the X parasite in the opening. She got infected and some scientists try an experimental cure: cells from the (now dead) baby Metroid. It works, and she gets sent to exterminate the X in the BSL station. The X get smart, though, and ''cold'' X start showing up at a later point in the game (this is because Samus inherited the Metroid's weakness to cold as well as its ability to absorb X). It takes an armor upgrade later on to allow Samus to absorb cold X.
* ''[[VideoGame/TwelveThirteen 1213]]'': [[spoiler: the protagonist is immune to any disease or poison]], which sets up the horrifying ending.
* Reimi in ''VideoGame/StarOceanTheLastHope''. This is because [[spoiler:as a Seed of Hope, she is genetically engineered for survival on new and unknown worlds]]. Unfortunately, she ended up with a case of SurvivorGuilt when a radiation leak killed off all of her friends except for her.
* The four survivors in ''VideoGame/DeadIsland'' are immune to the virus that turns the entire island of Banoi into zombies. [[spoiler:As with VideoGame/Left4Dead above, it turns out they're not exactly "immune" so much as they are "asymptomatic carriers".]]
* In ''VideoGame/NinjaBlade'', parasitic hookworms known as "Alpha-worms" end up infesting the whole city and turning them into monsters...except for the ninja protagonist Ken Ogawa, who for some reason seems to be the only one immune to being infested, and can thus safely battle all the enemies. This turns out to be because [[spoiler: he has ''toxic blood'' in him, which is deadly to any parasites that would dare try to infest him. And he has that toxic blood because his father, Kanbe, has it too. So the immunity is genetic.]]
* [[spoiler:Ellie]] in ''VideoGame/TheLastOfUs''. Technically they are Infected, but a random mutation rendered their fungal growths harmless. At the end of the game, [[spoiler:the Fireflies attempt to create a vaccine from her, even though the process will kill her. Unable to accept this, Joel instead kills his way through the Fireflies and escapes with her, thus possibly dooming humanity.]]
* In ''VideoGame/ZombieExodus'' you find out [[spoiler:Devlin]] was bitten but didn't turn.
* In ''VideoGame/DeadRising3'', [[spoiler:protagonist Nick]] is immune to zombification. This is because [[spoiler:Carlito inoculated Nick with the cure instead of the zombie virus like the other orphans to ensure that his ZombieApocalypse would not be unstoppable.]]
* The ''VideoGame/ResidentEvil'' series has several notable examples:
** It was eventually explained via subtle RetCon that the T-virus and its variants weren't 100% effective and roughly 10% of humanity was resistant to it to some degree, in comparison to the original games running off the assumption that "your character is just so badass that they never got hit". Furthermore, Umbrella has worked on various antiviruses to the T-virus, most notably seen in ''VideoGame/ResidentEvil3Nemesis''.
** Sherry Birkin is more or less kidnapped by the US Government and put under constant surveillance because, due to the events of ''VideoGame/ResidentEvil2'', she is the sole known source of both the G-Virus and the Devil Vaccine that cured it. [[spoiler:In ''VideoGame/ResidentEvil6'', it's revealed that the Devil only suppressed G and allowed her body to assimilate it, giving her a powerful HealingFactor without losing her mind or turning into a mutant horror]].
** Jill Valentine is implied to be immune to the T-Virus after being cured of her infection in ''VideoGame/ResidentEvil3''. [[spoiler:This is confirmed in ''VideoGame/ResidentEvil5'', when it's noted that after she got kidnapped by [[BigBad Albert Wesker]], she turned out to be useless as a test-bed for T-Viral experiments due to her innoculation back in ''3''. However, in the same game, it also works ''against'' her, as the antibodies in her blood were used to improve the Ouroboros virus and this made Wesker decide to brainwash her into serving him as TheDragon rather than just experimenting on her.]]
** Jake Muller is completely immune to the effects of the C-Virus [[spoiler:because he is Albert Wesker's son and was conceived after Wesker was juiced up on the virus that gave him superpowers]].
** Sergei Vladimir is a variant; he's one of the one-in-ten-million who has "total genetic compatibility" with the T-Virus and all its strains, which means that infection doesn't turn him into a TechnicallyLivingZombie, but one of Umbrella's ultimate {{Super Soldier}}s, the Tyrants.
** In ''VideoGame/ResidentEvil7Biohazard'', both Ethan Winters and Zoe Baker are this to a degree, downplaying the trope. [[spoiler:Ethan is heavily resistant to the MindControl aspect of the mutamycete's fungal infection, and so he doesn't start to begin suffering it until the final minutes of the game. Zoe, meanwhile, seems to be completely immune to the MindControl side of the infection, which is why she is TheUnfavorite amongst her infected kin, but this doesn't protect her from Eveline's ability to simply kill off those who are infected with her fungus, even after taking the fungicidal serum.]]
* Eve in ''VideoGame/MassEffect3'' wasn't originally unaffected by [[SterilityPlague the genophage]], but was cured by Maelon in ''VideoGame/MassEffect2'', and is now the most important person when it comes to finding a cure.
* ''VideoGame/BlazBlue'' actually downplays this trope. Seithr corruption is a perpetual threat in the world due to the omnipresence of [[{{Magitek}} ars magus]], but seeing as how it is necessary to maintain the current state of the world, nobody sees a problem with it. That said, different individuals process seithr at different rates, so some folks show corruption effects sooner than others. Where this trope comes in is a bit of {{foreshadowing}} in Arcade mode, where precisely one character has their erosion rate measured, and is noteworthy of having it being extremely low: Makoto Nanaya, at 0.2%.
-->'''Hakumen''': So there are still souls in this world as pure as yours. I suggest you cherish this rare commodity, for the sake of us all...
* It's not really brought up in the game, but some of the in-game documents in ''Videogame/{{Dishonored}}'' hint that all Serkonans are immune to the Rat Plague because they are the descendants of survivors of a Rat Plague outbreak on Serkonan who passed on their genetic immunity to their offspring. This would explain why Corvo and Daud, both Serkonans, never contract the Plague despite being exposed to it so often.
* ''Franchise/DragonAge''
** Meta-example: In ''VideoGame/DragonAgeOrigins'', the entire party is this to the darkspawn taint. Alistair and the player character already ''have'' the taint by virtue of being Grey Wardens, but the others in the party develop an immunity to it purely as a gameplay necessity. It was originally intended that the party members could be put through the Joining ritual to become Grey Wardens, as they would otherwise be dying from the taint toward the end of the game, but this was jettisoned for plot and time reasons. Their immunity is not mentioned in the game.
** This actually serves as a minor plot point in ''VideoGame/DragonAgeInquisition''. A magister researching Leliana, a returning character and former ''Origins'' companion discovers her to have a higher resistance to the taint than any known subject.
** Members of the Seekers of Truth, essentially [[CapeBusters Templar]] InternalAffairs, are immune to mind control and DemonicPossession. It is a benefit of the same initiation ritual that allows them to use special anti-magic powers without [[GreenRocks lyrium]]. [[spoiler:Seekers are made [[EmptyShell Tranquil]] and then immediately cured by having a Spirit of Faith touch the initiate's mind. If successful, the initiate gains the powers and immunity of a Seeker. If unsuccessful, the initiate [[FateWorseThanDeath is left permanently Tranquil]]. At some point, a mage attempted to join the Seekers, seeing it as a solution to fact that Mages are at much higher risk of possession. He failed, and accidentally discovered that Tranquil mages can no longer use magic and become invisible to demons. [[UnwittingInstigatorOfDoom Things spiraled downward from there over the next nine-hundred years]].]]
* An odd twist can be seen in ''VideoGame/WorldOfWarcraft''; Anyone under the Worgen Curse is immune to the plague of undeath.
* In ''VideoGame/DeusEx'', JC Denton tests positive for [[ThePlague Gray Death]], but shows no signs of infection. [[spoiler:It's because the Gray Death is a [[{{Nanotechnology}} artificially created nano-virus]] and JC's [[{{Transhumanism}} nano-augs]] use the same hardware architecture. He's already eyeballs-deep in such nannites. Presumably, his brother Paul is similarly (not) affected.]]
* ''VideoGame/TheElderScrollsIIIMorrowind'': It is not given much attention, but this is one of the reasons why the Nerevarine is sent alone into Red Mountain, aside from the prophetic and infiltration aspects -- [[spoiler: earlier in the main quest the Nerevarine gets infected with [[ArtificialPlague Corprus]] and then cured of the negative sides, which leaves them immune to ''all'' diseases, including Blight and Corprus.]] Since Red Mountain is the source of the Blight and Corprus...

* In ''Webcomic/WanderingOnes'', this is the reason [[DepopulationBomb Mavon's plague]] didn't completely sterilize the Earth's human population.
* ThePlague in ''Webcomic/StandStillStaySilent'' attacks all mammals, but in every species, some percent is immune. For humans, in Year 90 it's about 11% on Iceland and 48% in the rest of Known World. All cats and non-mammalian species are immune as well.
** The trope gets some degree of deconstruction, as the setting regularly shows the reader that the PlagueZombie monsters are still dangerous to those who are immune. In the prologue, immune non-combatants point out that they would die if they went outside the safe areas. Later in the story, an immune character who took a PlagueZombie bite in place of someone who isn't immune develops an infection due to the fact that she got bitten by another (sort of) living being, which carries the same risks as being bitten by an animal in real life, regardless of her incapacity to catch ThePlague.
* ''Webcomic/{{Uncreation}}'' is about an entire knightly order of them, who stage crusades in the plagued lands on the behalf of TheEmpire.
* In ''Webcomic/ManlyGuysDoingManlyThings'', [[spoiler:Canadian healthcare has rendered Canadian Guy immune to [[{{Bishounen}} Nomura Syndrome]].]] They utilize this to get everyone else cured.
* In ''Webcomic/{{Endtown}}'' there are a few people who seem immune to the mutation virus. The Topsiders refer to them as "Typhoid Mary's" since even if they aren't mutated, still carry the virus, and do even more horrific things to them than normal mutants, who are simply disintegrated or turned into {{Wetware CPU}}s.
* ''Webcomic/GirlGenius'': For some unknown reason, the people of Mechanicsburg are immune to [[PuppeteerParasite slaver wasp infestation]]. After a sweep by the Vespiary Squad and their [[EvilDetectingDog wasp eater weasels]], the only two revenants found were a couple of non-resident tourists. [[SarcasmMode This in no way will be important later on]].

[[folder:Western Animation]]
* A ''[[WesternAnimation/TheSimpsons Simpsons]]'' Halloween special had Bart immune to the zombifying effects of the Krusty Burger. The survivors of the outbreak wanted to eat Bart, but they compromised by having Bart taking a bath with their food.
* The lice episode of ''WesternAnimation/InvaderZim''. Zim (and Ms. Bitters, actually) are immune to the lice infestation. This leads to Zim being studied, and guess what? His skin, it destroys the lice! This lead to the creation of a [[{{Squick}} Skin Gun]] to take down the "lice Queen". They do eradicate the Queen at least... except [[spoiler:Ms. Bitters just has a higher scratch threshold than most, and ''was'' infected]].
* In the television version of the ''WesternAnimation/XMen'' "Legacy Virus" storyline, Cable came back in time to ensure that {{Wolverine}} would be infected with the titular virus, because his healing factor would both render him immune and lead to the development of a cure.
* In ''WesternAnimation/SouthPark'', Cartman and Kyle get infected by HIV, and Cartman vows to find a cure. They go to Magic Johnson's house to figure out why he recovered from HIV. They notice that his bedroom is full of piles of money, because he doesn't trust banks. Sure enough, injecting shredded money into their veins cures them. Then Africa is informed of the good news, all they have to do is roll around in all their money.
* On the ''WesternAnimation/SpongeBobSquarePants'' ChristmasSpecial "WesternAnimation/ItsASpongeBobChristmas", Plankton uses [[{{Unobtanium}} jerktonium]] to make everyone into a jerk. [=SpongeBob=], however, turns out to be immune to its effects due to his [[IncorruptiblePurePureness 100% pure heart]].

[[folder:Real Life]]
* Dairy farmers in the 18th century were found to be immune to smallpox, due to exposure to cowpox, which is caused by a very similar, closely-related virus but is far less virulent.
** The discovery that milkmaids had unusually low occurrence of smallpox led to Edward Jenner's invention of vaccination. Historically, ''inoculation'' for smallpox involved taking ground-up smallpox scabs and putting them in a cut on the hand (or some such), which did usually lead to immunity but would also typically lead to a mild case of smallpox, and in over 20% of cases full-blown smallpox (UsefulNotes/JohnAdams' younger son Charles had such an episode 1776; the process of inoculation is shown in all its graphic detail in ''Series/JohnAdams'') and in 23% of cases would lead to death (which is substantially better than the death rate for smallpox -- 2060% -- which is why people bothered in the first place). Jenner's discovery led to a similar process being used with cowpox, which would almost never kill and which typically only caused a bit of inconvenience.
** The very word vaccination comes from ''vaccus'', Latin for "cow", in honor of Jenner's discovery.
* Individuals with the [[ Delta 32 Mutation]] are immune or highly resistant to HIV infection. Historical and family records indicate that the ancestors of these individuals also had a higher survival rate during the Black Plague.
** While the Delta 32 mutation is the most famous mutation to grant aids resistance, people with this gene are actually the minority of long-term nonprogressor individuals with HIV. Other genes that assist in stopping aids progression are various HLA types: HLA-B5701, HLA-B5703, and HLA-B2705.
** Individuals with these genes are usually not totally immune to HIV, but instead show the ability to exert long term control over the virus without medication, and may be carriers in some cases.
* Indigenous populations in areas where malaria is a concern are often prone to sickle-cell anaemia, a genetic disorder characterized by malformed sickle-shaped blood cells. Two copies of the defective gene sickle all blood cells, but having one good and one defective gene only sickles one-third of the cells, which hinders the development of any one of the [[FourIsDeath four]] protozoan species responsible for malaria, so it comes out as an evolutionary advantage overall. However, due to modern medicine, malaria is treatable and a lesser concern.
** Similarly, it appears that having one copy of the cystic fibrosis defective gene grants some resistance to cholera.