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Instant Illness

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In the world of fiction, illnesses always progress as quickly as a heart attack. A person feeling ill will drop down within minutes of the first signs of an illness. Similarly, only hours or minutes remain for an antidote to take effect. To be fair, many diseases have a very fast progression (septicemic plague, for example, was described in Medieval writing as "the man coughs at dawn, takes to his bed at noon, and is dead by sundown.") but this trope is about diseases that move unusually fast (i.e. at the speed of plot).


This unrealistically speedy disease progression, apart from the need to squash a 24-hour or week-long disease into the 1 or 2 hours you can keep viewers interested, is motivated by the Rule of Drama: Nobody cares about an illness that takes weeks to develop.

See also Relationship Compression, Travelling at the Speed of Plot, and Transformation at the Speed of Plot. Contrast Soap Opera Disease and Victorian Novel Disease



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     Anime and Manga  

  • In Ergo Proxy, when Re-l goes to the commune outside of Romdeau to retrieve Vincent, she immediately gets sick from contamination exposure when she takes off her protective suit.
  • In Fruits Basket, Yuki tends to collapse pretty quickly if he's in the cold or overexerts himself. It's explained that he was pretty sickly as a child, and his massive self esteem issues brought on by being abandoned by his family and tormented by the head of the house no doubt contributed.
  • Shiina of Gourmet Girl Graffiti would have this when she has water splashed on.
  • This happens a few times in Hana Yori Dango but the most ridiculous example is when Tsukushi falls into a swimming pool in a warm, tropical setting and instantly gets a bad fever. This prevents her from getting physical with Domyoji when they are finally alone together.
  • In Yuu Watase's manga Imadoki!, early in their acquaintance, Kugyou finds Tanpopo planting flowers in the rain, and she suddenly collapses with a fever. She hates hospitals, so he takes her back to her apartment instead, and has to take care of her—including changing her clothes while she's unconscious.
  • In the fourth episode of Seitokai Yakuindomo, Tsuda seemed perfectly healthy until the moment he steps out from under an umbrella. Within seconds he sneezes and is sick for the next episode.

     Fan Fics  

  • The Toxic Plate is capable of creating such in Legendary Genesis.
  • In Woof Woof Power, Big D suddenly has an open bleeding chest wound a few months after he was stabbed there. You would think it would have healed, but it just suddenly springs up and he dies.
  • In this unnamed Mork & Mindy fanfiction, Mork goes from healthy to feverish in a few minutes. Then again, he is an alien.


  • In Cinderella (2015), Ella's mother is shown singing her daughter to sleep on a perfectly normal, happy night, then coughs lightly as she leaves the room, and then suddenly faints in her husband's arms. In the next scene, she's on her deathbed.
  • In Deadpool (2016), Wade's late-stage cancer comes out of nowhere when he suddenly drops unconscious in his apartment.
  • In Chaplin's The Kid, John, Charlie's Doorstop Baby, is feeling feisty enough to beat up a kid twice his size. Not more than ten minutes later, John is severely ill, so sick that he has to be carried back to Charlie's little apartment.
  • In North Sea Texas, Marcella offhandedly mentions that she needs to get her kidneys checked. The next time we see her is on her deathbead.
  • In the film Seasons of The Heart, the narrator/protagonist is a woman whose two young daughters died of cholera. In describing the tragedy, she says that less than a day before they died, they were running around picking wildflowers. They fell ill that afternoon, and both were gone by the next morning. She even lampshades it a bit, beginning the story by saying, "There was no illness that extinguished the flame of life as swiftly as cholera." This one is Truth in Television for the setting (mid to late 1800s, somewhere along the Oregon Trail): depending on the strain, cholera actually can be that lethal, and not only were there no treatments, but as far as they were from settled lands, they probably didn't have access to a doctor at all.


  • The Chalet School books are pretty bad for this, probably because of Values Dissonance and girls being considered to be delicate, as well as the school's large Ill Girl contingent. Any exposure to chills, rain, drafts, mud or cold water is fairly certain to leave the victim in the grip of a life-threatening disease if they're not immediately put into a hot bath and then into bed with two hot water bottles. In one book, Jo spends three days unconscious and is bedridden for over a week after standing for literally a few minutes by an open door on a snowy day.
  • Galaxy of Fear once has Tash given an injection that, within hours, has her sweating, feeling unusually irritable, and growing a rash-covered lump on that arm. Then it starts oozing, because it's the Blob Monster Virus. The one responsible actually coolly observes that the disease isn't progressing in her as fast as he'd expected.

     Live Action TV  

  • Happens every week on House, although the show handwaves it by saying that the patient only sought Dr. House's help when the diseases is at its final stages (when it can progress that fast), or because the overly invasive diagnostic tests and treatments House prescribed is causing an adverse reaction.


  • Jake Heggie's operatic adaptation of Moby-Dick portrays Queequeg's near-fatal illness this way, with him seeming perfectly well throughout most of Act 3, Scene 1, but then suddenly collapsing near the scene's end. This isn't the case in the novel, but the opera naturally had to compress the timeline for the stage.


  • Our Miss Brooks: In "Measles", Miss Brooks catches the measles within twelve hours of being exposed to them.

     Video Games  

  • In Skool Daze, there is an event where a student has the mumps and you must avoid all physical contact with him for the duration of break-time (a few minutes). If he does touch you, you instantly develop mumps and get sent home, ending the game.
  • If you're bitten by a mosquito during the Suez Canal chapter of Jigsaw, you will drop dead from malaria within a few turns.
  • In Metal Slug 3 and 4, any player character or civilian hit by infectious zombie fluids drops dead immediately, gets struck by a lightning bolt and becomes a zombie, all in the span of 2 seconds. The inverse is also true— a zombified player character merely touching a medkit is instantly cured and turns back to human immediately.
  • In Ni no Kuni right out of nowhere Oliver's mother suddenly falls to the ground; which is explained by a random NPC as "She always had a weak heart dear". This is pretty much never elaborated on at any other point.
  • In All Aboard, the game 4 of Westward, citizens can suddenly become sick, rendering them unable to work. They either heal after so many minutes or can be taken to the doctor's office for a quick heal.
    • Game 5 Kingdoms adapts this from a simple illness into being turned into a frog by means of a curse, for the same effect.

     Western Animation 

  • A lot of shows that deal with the chicken pox, don't bother to show the aches, fatigue and fever that typically start a day or two before the rash appears, but just have the sick character suddenly develop spots.
    • Madeline: In Madeline and the Costume Party, the twelve girls suddenly notice each other spots while showing each other their party costumes.
    • Muppet Babies (1984): Piggy suddenly breaks out in spots during a charades game and doesn't notice until the other kids mistakenly assume she's pretending to be a leopard.
    • Katie and Orbie: in Chicken Pox Party, Katie suddenly starts to itch and breaks out in spots in the middle of the afternoon of Halloween.
    • Milly Molly: In "Spots and Stripes", Milly gets chicken pox. She doesn't get it gradually, she just wakes up showing all the symptoms.
    • Arthur: Zigzagged in "Arthur's Chicken Pox". Arthur's chicken pox comes on gradually, with him having a fever hallucination in art class and needing to go see the school nurse well before the spots appear, but at the end of the episode D.W. just wakes up with spots all over.
  • Harry and His Bucket Full of Dinosaurs: Zigzagged for Harry's dinosaurs in "Achoo". Taury casually remarks that he is not feeling too good, then he breaks out in purple spots and becomes sick with "Itchy-spot-itis", then it spreads to Sid who instantly becomes sick... with a different disease. At the same time, Pterence gets a third disease and Trike gets a horn ache, though it's unclear who they caught those diseases from and when. Patsy also doesn't get sick until much later and Steggy doesn't get sick at all.
  • The Loud House: In "One Flu Over the Loud House", the Louds and their pets all get the flu and all of them become sick within seconds of being infected, with the exception of Luan and Lincoln (who had a minor delay compared to the others and started sneezing before showing other symptoms) but even their illnesses took a matter of minutes to show.

  • Peppa Pig:
    • In "George Catches a Cold", not only did George catch his cold from the rain, but he became sick in a matter of seconds.
    • In "Pedro's Cough", Pedro gets this bizarre disease where the only symptom is a cough and it spreads extremely rapidly. It can be instantly cured with a medicine that apparently has a bad and unusual taste.
  • Rugrats: Subverted in "All's Well That Pretends Well": The adults think that the babies have suddenly gotten sick, but actually they were pretending, so that they could keep Angelica (who was apparently sick at the time) company.
  • In one of The Simpsons "Treehouse of Horror" episodes (spooky non-canon episodes that air around Halloween), the Simpsons go back in time while Homer catches a cold and not only does he catch it instantly, he spreads it to the dinosaurs and they catch it instantly too.


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