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Scenario mad cow disease "Panic over BSE almost shut down the beef industry in the 1990s. Imports were banned and burgers were off the menu until humanity got things under control. Recently though, unforeseen protein folding has resulted in a new variant of the prion - putting the whole food chain at risk. Is now the time to go vegetarian?"
— Plague Inc., Mad Cow Disease introduction paragraph

The Mad Cow Disease, known in-game as 'v2.CJD', is a plague type and scenario in the Mutation 1.15 update. It is one of the three scenarios that are included in the update, along with Flight Club and Where Is Everyone?. The update also emphasized this scenario in the name of "Mega Moo-Tation".

Mad Cow disease has a very high severity at the beginning of the game because of the pre-evolved symptoms, being so severe the disease will be easily detected, so the cure will be developed earlier, so it is necessary to devolve certain symptoms such as Psychosis, Confusion, Memory Loss and Headache.[3] Due to the severity of the pre-evolved symptoms, having them for a certain period of time causes humans to discover the disease in at least one month in the game.[4]

Scenario Attributes

Mad Cow Disease manifests as a Prion, with v2.CJD as its default name. Confusion, Dysphagia, Headache, Memory Loss, Paranoia, Pins and Needles and Psychosis appear as pre-loaded traits.

The traits found to the northwest of the symptom panel help to primarily increase the lethality to rapidly destroy humanity such as Systematic Infection and Total Organ Failure. In the southeastern part of the symptom panel are the symptoms that relatize the cure such as Mania and Insanity. In general, it is recommended to start with the lethal symptoms to quickly destroy the public order of the infected countries and then use the cure relatizing ones to prevent the cure from being completed, because the player has a limited number of DNA points, so they can only evolve the most important ones first.[5]

One of the reasons it was characterized is because it starts with a very low infectivity, in addition to the lethality which is also low at the beginning, and the prion kills too slowly[6] so it is necessary for the disease to evolve lethal symptoms such as Total Organ Failure, Necrosis and Mania[7] at just the right time to get a good score. If the player returns all the initial symptoms of Mad Cow Disease in addition to not having Cross Human Infection evolved, the game will display a message, which is about neutralizing the disease, which will limit the player's options,[8] which only remains as a single option Acute Encephalitis, which kills the infected quickly,[Note 1] additionally, in the event that the player evolves this symptom or mutates by itself, the player will unlock the symptom "Confusion".[9]

Unlike other diseases, Mad Cow Disease has no drug resistance to spread in rich countries, so the only way to infect these countries is to use certain transmissions such as the spread of pathogens through avocados, in addition, the pre-evolved beef transmission gives the disease a little bit of a bonus to spread in rich areas. Storage Resilience transmissions replace Air and Water transmissions, in which it is necessary to use them to increase the chances of the disease being spread by boats and airplanes.This scenario does not have transmissions which help to increase infection in urban areas, so countries like China may present a problem to the player, alternatively the player can use the Coughing symptom, which gives the disease a small bonus to spread better in these types of countries. The Fish transmission acts as a kind of spore for this disease, which serves to spread to healthy islands[Note 2][10]

Initially, this disease has a weakness which is that it cannot naturally infect vegetables, so vegetarians will be safe. This can be avoided by using the Plant Dissemination ability, which unlocks new transmissions upon pathogen growth in fruits and vegetables. In the event that the disease is discovered and the ability has not evolved over time, it will cause a large number of people to become vegetarians every day, which will gradually reduce the infectivity in the world.[Note 3]

Transmissions

Avocado Pathogen spreads through consumption of avocado. Increases infectivity, especially in rich countries
Beef Pathogen spreads through consumption of beef. Increases infectivity and chance of mutation. Popular in rich countries
Broccoli Pathogen spreads through consumption of broccoli. Slightly increases infectivity
Dairy Pathogen spreads through consumption of dairy products, such as milk and cheese. Increases infectivity and chance of mutation
Fish Pathogen spreads through consumption of ocean travelling and farm raised fish stocks. Increases infectivity and chance of mutation
Frozen Storage Resilience Cell-adapted shifts in protein structure lets pathogen thrive over long food supply chains. Increases ship and plane transmission
Hermetic Storage Resilience Minor protein alterations raise chance of pathogen remaining active via long haul food suply chains. Increases ship and plane transmission
Insect (Mad Cow Disease) Pathogen spreads through (accidental) consumption of insects. Increases infectivity and chance of mutation. Especially effective in arid climates
Lamb Pathogen spreads through consumption of lamb and mutton. Increases infectivity and chance of mutation
Maize Pathogen spreads through consumption of corn products. Increases infectivity, especially in poor countries
Mango Pathogen spreads through consumption of mangos. Increases infectivity, especially in hot climates
Pork Pathogen spreads through consumption of pork. Increases infectivity and chance of mutation
Potato Pathogen spreads through consumption of potatoes. Increases infectivity, especially in cold climates
Poultry Pathogen spreads through consumption of poultry. Increases infectivity and chance of mutation
Preservative Storage Resilience Significant amino acid variances trigger rapid pathogen development when refrigerated. Increases ship and plane transmission
Rabbit Pathogen spreads through consumption of rabbit. Increases infectivity and chance of mutation. Especially effective in rural countries
Rice Pathogen spreads through consumption of rice. Greatly increases infectivity, especially in hot climates
Wheat Pathogen spreads through consumption of wheat. Increases infectivity
Wild Game Pathogen spreads through consumption of wild game. Increases infectivity across land borders and raises mutation chance

Symptoms

Confusion Dopamine production stimulated to cause bouts of confusion in host. Harder to concentrate on complex work.
Dysphagia Difficulty swallowing causes occasional coughing when eating. Slight increase in infectivity.
Headache Strong headache behind the eyes causes discomfort and reduces ability to work.
Memory Loss Recent memories become nebulous in patients, replaced with vague historical recollections. Negatively impacts cure process.
Paranoia Irrational delusions and mental symptoms. Victims distrust of others makes them unlikely to seek treatment or cooperate with others.
Pins and Needles Breakdown of the nervous system causes victims to experience numbing or tingling sensations in extremities.
Psychosis Psychotic episodes lead to occasional bursts of extreme violence which can be lethal. Increases infectivity and slows future research speed.
Acute Encephalitis Multiple inflammatory lesions in the brain triggered. Causes neurological damage resulting in death.


Cross-Infection Traits

These are unlocked after Human Cross-infection has been obtained.

Abscesses Pockets of infected flesh are painful and act as breeding grounds for the pathogen, increasing infection rates when burst.
Ataxia Cerebellum becomes vulnerable to infection, impairing victims' coordination, balance, and speech.
Blindness Primary visual cortex disconnected causing blindness. Significantly reduced awareness and causes fatal accidents.
Cannibalism Extreme Compulsion to bite or eat other humans - significantly increasing infectivity as well as lethality.
Coma Neuropathic effects in the brain stem cause loss of consciousness and sometimes death. Significantly harder to cure.
Coughing Chance of infection by spreading pathogen into surroundings. Especially in high density, urban areas.
Delirium Reduction in cognitive function causes irrationality and paranoia. Can be fatal and significantly slows future research speed.
Hallucinations Occipital lesions created, causing severe hallucinations. Lack of awareness increases transmission chance as well as risk of injury.
Inflammation Inflammation obstructs bodily processes. Swelling can obstruct breathing and be fatal.
Insanity Neuropathic action of the pathogen in the frontal lobe causes severe emotional and behavioural abnormalities. Significantly harder to cure.
Mania Excess serotonin production triggered. Manic episodes lead to increased contact with others and inability to focus.
Necrosis Large swathes of infected tissue lose blood supply and become fatal sources of gangrene. Decomposed bodies remain a vector of transmission.
Paralysis Pathogen destroys motor neurons to cause paralysis. Significantly harder to cure and lethal.
Pneumonia Serious fluid build and discharge from the lungs. People in cold climates especially vulnerable.
Pulmonary Oedema Potentially fatal heart abnormality causes breakdown of respiratory system, releasing pathogens into the air.
Seizures Random blackouts and fits reduce the patient's ability to function independently. Can be fatal
Systemic Infection Pathogen affects multiple organ and tissue types, causing body-wide infections that spread fast and can be fatal.
Total Organ Failure Catastrophic cell death of multiple tissue types causes body-wide organ failure and rapid death.

Abilities

Mad Cow Disease has two unique abilities, but shares the vast majority of them with standard plagues otherwise, and additionally lacks Drug Resistance 1 as well as Drug Resistance 2.

Plant Dissemination - Adjustments to protein folding give Prion the ability to infect plant life. Unlocks new transmissions.

Human Cross-infection - Radical folds of amino acid sequence allow prion to be transferred between humans. Unlocks new symptoms.

Gallery

Recommendations

  • The Japanese mobile gaming website Apprimo.info recommends to return the symptom "Acute Encephalitis" if it mutates at an early stage of the game, because it is a high severity symptom, so it makes humans alert and start to develop the cure earlier.[11]
    • Depending on which areas of the world do not have a significant infection when the disease is spreading around the world, the website recommends to evolve certain plant transmissions such as Potato for areas with cold climates or Avocado for rich countries.[11]
      • Using plant infection transmissions is very useful to spread the disease in countries with this climate, such as Canada, which is a rich country that normally has low temperatures.[12]
    • In addition, the website recommends that if the cure is half complete, it is necessary to evolve Human Cross Infection and obtain symptoms that will slow down the cure development such as Insanity and Mania.[11]
  • The Acute Encephalitis symptom is useful enough to kill the infected within a year, but being so severe it causes countries to serve their borders quickly. In addition, another useful symptom is Cannibalism, which is not as lethal as the previous symptom, but helps to increase infectivity quite a bit.[4]
  • If the player starts in Saudi Arabia or Egypt for this scenario it is better to use the Insect transmission in order to be able to spread quickly in this kind of countries, because this trait gives a bonus to the disease to be able to infect better this kind of areas of the world.[13]

Trivia

« Mad Cow Disease was a particularly intriguing scenario to put together, as we got to really think hard about what the world would look like if there was a re-emergence of the infamous 1990s outbreak. Although we naturally took the research and ran with it, so expect a few surprises as you figure out the best way to wipe out humanity via food! »
— Quote from the game developers about this scenario (2017)[14]
  • When the disease is discovered in this scenario, the game will display two messages about plague-specific information, such as the fact that the disease presents major differences from the 1990 variant of Mad Cow Disease, a real-life variant that appeared in the UK during that decade, so it makes humans not know much about the player's disease outbreak
    • Additionally, when the disease is newly discovered, the game will mention that prions can't be cured in the traditional way like other pathogens, but scientists around the world will try to find a "miracle cure" by exploiting weaknesses in the prion's genetic structure. This refers to the fact that prions can't really be cured in real life but in order to maintain balance and narrative within the game, Mad Cow Disease can be cured just like the prions of the Standard Plagues.[15]
  • This scenario has several government actions, most of which are the prohibition of cultivation of certain vegetables or fruits depending on which transmissions the player evolves in addition to the ban on meat production and imports.
  • Potato increases infection rate in cold countries(Severaly adviced on Greenland because its the only plant growed in Greenland
  • Mad Cow Disease was introduced in the Mutation 1.15 update with Flight Club and Where Is Everyone?.
    • The update also emphasized this scenario as a "Mega Moo-Tation".
  • It is necessary to use the Plant Dissemination ability in order to infect vegetarians, if the disease is discovered and the player has not evolved this ability, a pop-up will appear saying that a certain group of people are safe from getting infected because they do not eat meat, in order for the player to infect these people, it is necessary to use this ability.
  • Integrated into this scenario is an event that happens in the fish markets of Japan that causes a "Sushi Crisis".

Disease Information Popups

Notes

  1. This symptom is useful when a large part of the population is infected, but not at the beginning of the game, because it kills the infected very quickly before they can come into contact with healthy people from other countries
  2. According to the game files, which triggers an event called "fish_infect", in which the disease can infect fish shipments to healthy countries with seaports, it is not just exclusively islands
  3. The way the game does this is to activate a bunch of "Government Actions", in which there are 4 in total with the name "vegetarians_unnaffected", the first one reduces by -5 the infectivity, if a country has around 60% of its population infected and the last one massively reduces the infectivity of the disease, which subtracts -30, if the infected population is 90%. (See Game Files § Government Actions (File Name: govactions_standard #56677.txt))

References

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  1. "Plague Inc. Mutation 15 - The Mad Cow Disease Update is here!" (2017). Ndemic Creations Official Website
  2. "Plague Inc: Evolved Mutation 15 - The Mad Cow Disease Update" (2017). Steam News
  3. KonGa (2019-02-03). "공식 시나리오 : 광우병 - 매우 어려움 공략 프로파일". Naver Blog (네이버 블로그) (in Korean) Retrieved on September 10, 2022. “
    광우병은 프리온 기반의 전염병이기 때문에, 초반에 심각성이 엄청 높아진 상태로 시작한다. 초반에 심각성이 높게 되면 인류가 전염병의 발견을 빨리하게 되어 치료가 빨리 시작된다. 따라서, 게임 시작하자마자 혼란, 기억상실, 두통, 정신병을 반환시켜 심각성을 낮추고 시작하자. [Since Mad Cow Disease is a prion-based infectious disease, it starts with a very high severity in the beginning. If the severity is high in the beginning, the human race will be able to detect the epidemic faster, and the treatment will start sooner. So, let's start with lowering the severity of the game by returning confusion, memory loss, headaches, and psychosis as soon as the game starts.]
  4. 4.0 4.1 Coolsy101; Danger Moose (2019-01-19). "Plague Inc: Evolved – Mad Cow Disease Mega Brutal". Gameplay Retrieved on September 12, 2022.
  5. 팍스 (2019-05-19). "전염병 주식회사: 광우병 메가 브루탈 공략". [Plague Inc.: Beating Mad Cow Disease in Mega Brutal] Naver Blog (네이버 블로그) (in Korean) Retrieved on September 14, 2022. “
    다음 두 부분을 찍어야 하는데, DNA가 부족할 수도 있으니 치사율 부분을 먼저 찍은뒤 연구 방해를 마저 찍길 바랍니다. 아무리 연구 방해 증상을 많이 찍는다해도 치사율이 미미하면 국가 붕괴 이벤트가 쉽사리 안뜨기 때문입니다. [I need to take the next two parts of symptoms, but I may be short of DNA to get it, so I need to evolve the lethal symptoms first and then the ones that will slow down the cure research. This is because, no matter how many cure relaunching symptoms are taken, if the lethality rate is minimal, no country will go into anarchy or chaos.]
    ” (See Article Image, the red text is the lethal symptoms (치사율) while the yellow text is the symptoms that delay the development of the cure (연구 방해).
  6. Basost (20217-11-25). "Mad Cow Disease!!!! (Basost Guide)". Steam Discussions Retrieved on September 27, 2022.
  7. Firehawk (2017-11-28). "Mad Cow Disease!!! (Firehawk Clarification)". Steam Discussions Retrieved on September 27, 2022.
  8. Returning all symptoms in this scenario, the game triggers an event, which is called "evolve_symp_mad_cow", which is what displays this explanatory message (See Game Files § Events (File Name: standard_normal.txt)
  9. According to information in the game files, the confusion symptom can be triggered using Acute Encephalitis or Human Cross Infection, see Game Files § Mad Cow Disease (File: prion #56729.txt and the variable being talked about is "tech_requirement_or")
  10. 亦無今 (2021-08-26). "官方场景:狂牛怪疫 简单难度三星指南". Steam (in Simplified Chinese) Retrieved on September 27, 2022. “
    你应该希望鱼类传播可以帮你感染一个你尚未感染的岛国。不过没有感染也没关系。就剩1,2个岛屿的时候,sl一下就很容易上去了。最好上一个岛国就存档一次。如果某个没有感染的岛国锁航路了,那就直接读档。[You should hope that fish transmission will help you infect an island that you have not yet infected. However, it doesn't matter if you are not infected. It is easy to use it when there are only 1 or 2 healthy islands left. It is best to save once you reach an island. If one of the uninfected islands blocks its routes, it is better to restart.]
  11. 11.0 11.1 11.2 "「狂牛病」ハード・超ハード攻略まとめ。|PLAGUE INC -伝染病株式会社-ゲームアプリ攻略。" (2020-03-01). Apprimo.info (in Japanese) Retrieved on September 10, 2022.
  12. 엘프리 (2018-08-15). "[전염병주식회사] 광우병 3바이오 하자드 공략". Tistory (in Korean) Retrieved on September 11, 2022. “
    이 때 열 저항력, 식물전파, 감자 까지 포인트 소모가 크기 때문에 자칫 아보카도 까지 찍고 괴사를 찍을려고 했다가는 늦어지기 일 수 입니다. [Through plant propagation, we target cold regions and wealthy regions (especially Canada). At this time, heat resistance, plant propagation, and even potatoes consume a lot of points, so if you try to use avocado and evolve necrosis, it may be too late.]
  13. Pravus. "Plague Inc: Official Scenarios - Mad Cow Disease (Mega Brutal)". YouTube Retrieved on September 12, 2022. (Note: The relevant information is discussed from minute 3:45 onwards.)
  14. Loeffler, Jordan (2017-11-16). "Plague Inc. Update Infects Mobile Platforms with Mad Cow Disease and New Game Modes". Dualshockers Retrieved on September 12, 2022.
  15. See Narrative Message at the beginning of the game ( PC Version Screenshot)
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