Immunity Gain Speed

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 ara 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:

• 100%: When not resting/sleeping or when resting/sleeping on the floor, ground or sleeping spot.
• 105%: When resting/sleeping in an animal sleeping box.
• 107%: When resting/sleeping in an animal bed, single bed, double bed or Royal bed.
• 111%: When resting/sleeping in a hospital bed.
• 113%: When resting/sleeping in a hospital bed with attached Vitals monitor.

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

Resting:

• 100%: Not resting. Also, when downed, despite 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

• Immunoenhancer: +8% per, 16% max.
• Super-immune trait: +30%.

Version history

• 0.12.906 - Now affected by room stats

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Stats

Capacities

Blood Filtration  • Blood Pumping • Breathing • Consciousness • Eating • Hearing • Manipulation • Metabolism • Moving • Pain • Sight • Talking

Pawn Stats - General

Carrying Capacity • Eating Speed • Filth Rate • Foraged Food Amount • Global Learning Factor • Hunger Rate Factor • Immunity Gain Speed • Leather Amount • Lifespan Factor • Max Nutrition • Maximum Comfortable Temperature • Meat Amount • Mental Break Threshold • Minimum Comfortable Temperature • Minimum Handling Skill • Move Speed • Pain Shock Threshold • Psychic Sensitivity • Rest Rate Multiplier • Sleep Fall Rate • Toxic Environment Resistance • Toxic Resistance • Meditation Focus Gain • Neural Heat Gain • Neural Heat Limit • Neural Heat Recovery Rate • Conversion Power • Global Certainty Loss Factor • Ideoligion Spread Chance • Terror • Cancer Rate Factor • Fertility • Hemogen Gain Multiplier • Learning Rate Factor • Raw Nutrition Multiplier

- Mechanitor

Mech Bandwidth • Mech Control Groups • Mech Remote Repair Distance • Mech Remote Shield Distance • Mech Remote Shield Energy • Mech Gestation Speed • Mech Repair Speed • Subcore Encoding Speed

- Combat

Aiming Time • Incoming Damage Multiplier • Melee Armor Penetration • Melee Dodge Chance • Melee DPS • Melee Hit Chance • Mortar Miss Radius Multiplier • Shooting Accuracy • Trap Spring Chance • Melee Damage Factor • Ranged Cooldown Multiplier • Stagger Time Multiplier

- Social

Arrest Success Chance • Beauty (Pawn) • Negotiation Ability • Social Impact • Tame Animal Chance • Trade Price Improvement • Train Animal Chance • Animal Products Price Improvement • Slave Suppression Fall Rate • Suppression Power

- Misc

Biosculpter Occupant Speed • Growth Vat Occupant Speed

- Work

Animal Gather Speed • Animal Gather Yield • Butchery Efficiency • Butchery Speed • Construct Success Chance • Construction Speed • Cooking Speed • Deep Drilling Speed • Drug Cooking Speed • Drug Synthesis Speed • Food Poison Chance • General Labor Speed • Global Work Speed • Hunting Stealth • Mechanoid Shredding Efficiency • Mechanoid Shredding Speed • Medical Operation Speed • Medical Surgery Success Chance • Medical Tend Quality • Medical Tend Speed • Mining Speed • Mining Yield • Plant Harvest Yield • Plant Work Speed • Repair Success Chance • Research Speed • Smelting Speed • Smoothing Speed • Hacking Speed • Pruning Speed • Mech Work Speed Offset