Immunity Gain Speed

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Revision as of 07:41, 23 October 2022 by Doomster (talk | contribs) (Typo. Clarified.)
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Immunity Gain Speed is a stat: The speed at which this character gains immunity to diseases. If this is too slow, the character will die from the disease before developing immunity. Base value is 100%. The value shown in-game is rounded to the nearest whole percent, while exact value is used in calculations.

While this stat can be seen in-game, the actual immunity gain speed, measured in immunity gain per day, is hidden. It is calculated as a product of:

  • Base immunity gain speed for the particular disease. For example, 23.88% per day for human Flu.
  • InfectionLuck, a pseudorandom factor ranging from 80% (Bad luck) to 120% (Good luck). It is calculated independently for each disease instance (when multiple pawns are affected by a disease outbreak, each of them gets their own disease instance). Wound infections in different organs of the same pawn are different instances, but only InfectionLuck of the oldest active infection comes into play (and only one infection immunity develops in organism, opposing all infection instances). Technical details: InfectionLuck is not stored in save file. Instead, it is calculated as a pseudorandom value depending on the world's seed (seedString) and disease's hediff ID (loadID). For example, it is ≈81.7511% for seed InfectionLuck and ID 1947.
  • Immunity Gain Speed stat.

Immunity gain speed is not affected by medical tend quality.

Stat factors

Immunity Gain Speed stat is determined by many factors multiplicatively.

Capacities

Blood Filtration: 50% importance. No allowed defect. No Max.

  • Reduced by Malaria
  • 100% unless reduced by damaged or missing Kidney (pawn has two, at 50% each)
  • 170% with Luciferium

Saturation

Hunger/Food:

  • 100%: Fed or Hungry
  • 90%: Urgently Hungry (corresponds to Ravenously Hungry)
  • 70%: Starving (corresponds to Malnourished)

Rest

Rest need:

  • 100%: Rested
  • 96%: Tired (corresponds to Drowsy thought)
  • 92%: Very tired (corresponds to Tired thought)
  • 80%: Exhausted (corresponds to Exhausted thought)

In Bed:

Note that quality of the bed only influences the rest effectiveness, not the immunity gain speed.

Resting:

  • 100%: Not resting. Also, when downed, despite visually lying.
  • 110%: Resting, sleeping or skygazing (cloudwatching, stargazing, etc).

Age

Generally, the multiplier for age follows a curve defined by 5 points.

Age Multiplier
0.65 * Life Expectancy 100%
0.80 * Life Expectancy 95%
1.00 * Life Expectancy 90%
1.20 * Life Expectancy 80%
1.50 * Life Expectancy 50%

As life expectancy is 80 for Humans, the following are approximate values for them.

Age Immunity Gain Speed
<54 100%
54 99%
56 98%
59 97%
61 96%
63 95%
66 94%
69 93%
72 92%
76 91%
79 90%
81 89%
83 88%
85 87%
86 86%
88 85%
89 84%
91 83%
93 82%
94 81%
96 80%
97 79%
98 78%
99 76%
100 75%

Past age 100, it continues to gradually decrease until it hits 50% at age 120 and stays at 50% thereafter.

Misc

Version history