疾病

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Disease plays a large role in Base icon CK2.png Crusader Kings II, due to the lethality of ailments in the Middle Ages, and generally bad side effects they give to the player character. Most characters are capable of living through the majority of diseases, though some may still die when an outbreak occurs.

All diseases are represented by health traits.

Normal diseases

Disease Description
Ill.png Generic Illness

The most simple type of "disease," the trait ill reduces martial by 1, health by 2, and fertility by 10%.
Unless the ill person in question is very old, weak, or has another disease, the odds of someone dying from this trait is very low.
Generic illness and pneumonia are mutually exclusive. It is needed to have a health level of at least 3 to recover from this disease.
If DLC icon Reaper's Due.png The Reaper's Due Expansion is active, the illness trait is replaced by symptoms which will be treated by a court physician.

Pneumonic.png Pneumonia

Incompatible with ill, the pneumonic trait is far far more deadly. It reduces all attributes by 2 and reduces health by 4.
It also reduces fertility by 50%, making most characters very unlikely to procreate. The trait is often deadly; do not expect to have player character rulers survive this one every time.
It is needed to have a health level of at least 4 to recover from this disease.

Leper.png Leprosy

Another moderate disease, leprosy makes holding a large kingdom or empire together very difficult.
It reduces diplomacy and health by 2, and fertility by 20%. It also reduces sex appeal by 50, and all vassals opinions of their liege by 20.
Though leprosy has a +10 bonus with other lepers, chances are that a character will not make use of that bonus often.
It is needed to have a health level of at least 4 to recover from this disease.

Syphilitic.png Great Pox

A moderately dangerous disease, syphilis reduces all attributes by 1, health by 2, and fertility by 20%. Furthermore, it reduces sex appeal of the character by 30.
This disease will most likely shorten the lifespan of the player character, though it will not necessarily result in an abnormally early death.
One of the most dangerous features of this disease is that it can be passed down to children if one of their parents has this trait. This makes long-lived heirs more rare if the ruler suffers from great pox.
It is needed to have a health level of at least 6 to recover from this disease. There is a chance to remove this disease by choosing the Theology focus.

Epidemic diseases

Epidemics begin with an outbreak in one province, and can spread through adjacent provinces on the first day of each month.

When a county is affected by an epidemic:

  • A dark green cloud appears over the city sprawl
  • Characters living in that province will randomly become infected. Characters who have already contracted and recovered from the disease are not immune
  • City tax income is reduced
  • Supply limit is reduced, and attrition is greatly increased for troops in excess of the supply limit. These effects make warfare harder, especially when large armies are required or multiple diseases are present.

Rulers can protect themselves against epidemics by relocating their capital or by sending individual characters to other locations. Children aged 6-15 can be sent for education to other courts. Adults can lead troops or perform council missions in safer provinces. With DLC icon Reaper's Due.png The Reaper's Due, it is worth noting that only land provinces are safe: leading troops at sea while an epidemic ravages your capital is a sure way to contract Scurvy.png; going into seclusion can be considered a viable alternative.

Conversely, sending a character to an infected location can serve as a quiet way to dispose of a rival or an unwanted heir.

Outbreaks always begin in coastal cities. Cities with higher income are at higher risk. A capital which is far inland may be safer. The Black Death historically arrives around 1300-1400 AD, though the player can change it on the game rules panel at the beginning of a campaign.

List of epidemic diseases

Epidemic Contagiousness Outbreak Duration Trait Effects Recovery MTTH
(for 45yo with 5 base health)
Tuberculosis epidemic.png Consumption
(AKA Tuberculosis)
30% 1.2% 30 months Tuberculosis.png -2 health 24 months
Typhoid fever epidemic.png Slow Fever
(Typhoid Fever)
30% 1.2% 30 months Typhoid fever.png -2 health 4 months
Typhus epidemic.png Camp Fever
(Typhus)
50% 4% 10 months Typhus.png -4 health 12 months
Bubonic plague epidemic.png The Plague
(Bubonic Plague, Black Death)
95% 1% 10 months Bubonic plague.png -7 health 3 months
Measles epidemic.png Measles 60% 3% 8 months Measles.png -2 health 5 months
Smallpox epidemic.png Smallpox 50% 8% 8 months Smallpox.png -3 health 5 months
Smallpox epidemic.png Great Pox
(Syphilis)
50% 8%
(Dlc icon sunset invasion.png Sunset Invasion)
8 months Syphilitic.png -3 health, -20% fertility Recovery ONLY with Possessed.png trait

With Reaper's Due expansion

With DLC icon Reaper's Due.png The Reaper's Due active, the disease system becomes more complex. Characters will first contract symptoms which will then be diagnosed by their court physician. Hospitals can be built to fight epidemics at the province level and the epidemics also affect the level of prosperity in a county.

An Infection.png can develop after being Wounded.png. They can be dangerous as a court physician cannot treat this symptom; the player character may have to make up for the lost health by other means. However, it will heal on its own given enough time just like other diseases.

Outbreaks

Outbreaks can begin in any province, and may spread through single ocean tiles. Infected provinces tend to lose prosperity and may experience its opposite: depopulation. Basic hospitals provide minor protection from depopulation.

Upgraded hospitals can also prevent the county from becoming infected. This makes them useful not only in your capital but also in provinces near your capital, especially at chokepoints such as the Grisons-Lombardy mountain pass.

Certain events may reduce a province's disease resistance: a smugglers' ring forming and refusal to pay for a hospital's upkeep. High prosperity also lowers disease resistance.

The Black Death is larger and more deadly, and gets a chance of major outbreak to occur 200 years into any game, regardless of start date. (This can be changed on the game rules panel.) After a major outbreak has happened, the disease becomes endemic and may break out again, but likely on a smaller scale. The Black Death has special patterns. It may miss India, Africa, Scandinavia, Britain, or the Steppes. It also has a chance to miss a discontinuous region called the Historical Plague Exclusion Zone. Once you see evidence of which regions it is skipping, try to move your capital there.

Epidemics can never spread to Iceland, because it does not share any sea zones. However, Iceland is a small duchy in a weak de jure empire, so moving your capital there may reduce both demesne levies and vassal levies. Iceland is also far from everything else, increasing the risk of independence factions.

Seclusion

Rulers receive the option to go into seclusion when an epidemic spreads to counties near their capital. Alternatively, rulers with the Paranoid.png trait can go into seclusion at any time. Rulers must be landed or patricians to shut the gates.

Once the option to go into seclusion is taken, the ruler is isolated together with their courtiers. All secluded characters receive a -5 penalty to their Diplomacy attribute, and can no longer lead armies (if previously able to) or perform jobs (if they are councilors).

If the period of seclusion is too long, negative events may occur, and may result in characters obtaining the Cannibal.png trait, becoming Craven.png and experiencing food shortages. The ruler can also kick out any courtier who displays any symptoms of disease. Seclusion may fail if a courtier is exposed to the outside world or contracts a disease before becoming secluded.

Upon opening the gates, the ruler gets the Abandoned the commoners modifier. While this modifier is active (1 year), they have -10 general opinion and cannot shut the gates again.

Symptoms

名称 键值 ID Diplomacy Martial Stewardship Intrigue Learning 健康 好感 其他修正 可能的疾病/其他注释
Abnominal Pain 腹痛 abdominal_pain 215 -1 -10% 生育能力 Has Slow Fever Camp Fever Flu Dysentery Cancer
Chest Pain 胸痛 chest_pain 211 -2 -10 个人实战能力 Pneumonic Consumption Cancer
Cough 咳嗽 cough 207 -1 -0.25 -5 吸引力好感 Pneumonic Consumption Measles Flu Cancer
Cramps 抽筋 cramps 212 -2 -0.5 -10 个人实战能力 Food Poisoning The Plague
Diarrhea 腹泻 diarrhea 209 -2 -2 -1 -5 吸引力好感 -20% 生育能力
-1 个人实战能力
Has Slow Fever Camp Fever Flu Dysentery Food Poisoning Cancer
Fatigue 疲乏 fatigue 216 -1 -1 -0.25 -20 理性 Consumption Camp Fever Flu Gout Rabies Cancer
Fever 发热 fever 208 -1 -1 -10% 生育能力
-10 个人实战能力
-10 理性
Pneumonic Has Great Pox Consumption Has Slow Fever Camp Fever The Plague Measles Smallpox Aztec Disease Flu Dysentery Gout Food Poisoning Rabies
Headache 头痛 headache 214 -1 -1 -1 -0.5 -10 个人实战能力
-10 理性
Has Great Pox Camp Fever Smallpox Aztec Disease Flu Cancer
Infection 感染 infection 218 -3 -3 -3 -3 -3 -2 -10 吸引力好感 -10 个人实战能力
Wounded.pngSeverely Injured.png 时可能出现;添加在 Wounded.png 之上但替代 Severely Injured.png
Malaise 不适 malaise 217 -0.75 Has Slow Fever The Plague Smallpox Aztec Disease Flu Rabies Cancer
Rash 皮疹 rash 213 -0.5 -5 吸引力好感 -10% 生育能力 Has Great Pox Camp Fever Measles Smallpox Aztec Disease
Vomiting 呕吐 vomiting 210 -2 -2 -1 -5 吸引力好感 -30% 生育能力
-10 个人实战能力
Flu Food Poisoning Cancer

Diseases

名称 键值 ID Diplomacy Martial Stewardship Intrigue Learning 健康 好感 其他修正 杂项 费用
Aztec Disease 阿兹特克梅毒 has_aztec_disease 132 -3 -2 -2 -3 -2 -4 -10 吸引力好感
-5 大众好感
-30 个人实战能力
-20% 生育能力
Epidemic 瘟疫(Dlc icon sunset invasion.png 日落入侵之后)
Camp Fever 露营热 has_typhus 36 -1 -2 -1 -2 -4 -20% 生育能力
-40 个人实战能力
Epidemic 瘟疫
Cancer 癌症 cancer 230 -3 -20% 生育能力 老年更可能获得
Consumption 肺痨 has_tuberculosis 34 -2 -1 -2 -2 -25 个人实战能力 Epidemic 瘟疫
Dancing Plague 舞蹈瘟疫 dancing_plague 235 -1 -1 -1 -1 -1 -2 -25% 生育能力 Epidemic 瘟疫(稀少)
Dysentery 痢疾 dysentery 226 -1 -1 -4 -15 吸引力好感 -25% 生育能力
-20 个人实战能力
Flu 流感 flu 225 -1 -1 -1 -1 -1 -2 -10 吸引力好感 -10 个人实战能力 常见且短暂
Food Poisoning 食物中毒 food_poisoning 228 -2 -2 -2 -2 -2 -3 -15 吸引力好感 -50% 生育能力
-10 个人实战能力
Gout 痛风 gout 227 -2 -1 -2 -20 个人实战能力
Great Pox 梅毒 syphilitic 27 -1 -1 -1 -1 -1 -2 -10 吸引力好感
-5 大众好感
-20% 生育能力 10% 几率继承 -44
Slow Fever 慢性热 has_typhoid_fever 35 -2 -1 -1 -3 -10% 生育能力
-40 个人实战能力
Epidemic 瘟疫
Ill 身患疾病 ill 25 -1 -1 -10% 生育能力
-10 个人实战能力
拥有 DLC icon Reaper's Due.png 死神索命DLC,Ill.png 特质被症状替代
Leper 麻风病人 leper 28 -1.5 -15 吸引力好感
-20 大众好感
-95% 生育能力
-25 个人实战能力
Measles 麻疹 has_measles 38 -2 -1 -2 -10% 生育能力
-30 个人实战能力
Epidemic 瘟疫
Pneumonic 肺炎 pneumonic 26 -2 -2 -2 -2 -2 -4 -50% 生育能力
-35 个人实战能力
Rabies 狂犬病 rabies 229 -3 -2 -3 -2 -7 -20 吸引力好感
-5 封臣
+30 个人实战能力
-50 理性
Scurvy 坏血病 scurvy 238 -1 -1 -1 -1 -1 -3 -20 个人实战能力 在海上领导军队时获得
在海上3年后更可能获得
一种瘟疫在你的首都肆虐时更可能获得
-35
Sickly 多病 sickly 144 -2.5 儿童出生可能就多病
2至6岁间移除
Smallpox 天花 has_small_pox 39 -2 -1 -2 -3 -25% 生育能力
-100 个人实战能力
Epidemic 瘟疫
The Plague 黑死病 has_bubonic_plague 37 -2 -3 -2 -3 -2 -7 -50% 生育能力
-100 个人实战能力
Epidemic 瘟疫(几乎全图,许多特殊事件)

See also