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 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. So,
- Blood filtration factor = Blood Filtration ÷ 2 + 50%
Notable facts:
- Malaria progressively reduces Blood Filtration.
- A missing Kidney reduces Blood Filtration by 50%. This alone, results in Blood filtration factor of 75%.
- Luciferium adds 70% to Blood Filtration. This alone, results in Blood filtration factor of 135%.
Saturation
- 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 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
- Immunoenhancer: +8% per, 16% max.
- Super-immune trait: +30%.
Version history
- 0.12.906 - Now affected by room stats
- Capacities
- Pain • Consciousness • Moving • Manipulation • Talking • Eating • Sight • Hearing • Breathing • Blood Filtration • Blood Pumping • Digestion
- Basics | Important
- Market Value • Market Value Ignoring Hitpoints • Honor Value
- Non Pawn Important
- Nutrition • Medical Potency • Medical Tend Quality Maximum • Max Hit Points
- Basics
- Mass • Flammability • Psychic Sensitivity Factor • Psychic Sensitivity Offset • Neural Heat Limit Offset • Neural Heat Recovery Rate Offset • Slave Suppression Offset
• Terror (Source) • Max Install Count 
- Pawn
- Recreation Fall Rate • Sleep Fall Rate • Eating Speed • Foraged Food Amount • Minimum Handling Skill • Mental Break Threshold • Immunity Gain Speed • Pain Shock Threshold • Lifespan Factor • Minimum Comfortable Temperature • Maximum Comfortable Temperature • Injury Healing Factor • Caravan Riding Speed • Carrying Capacity • Filth Rate • Crawl Speed • Move Speed • Max Nutrition • Rest Rate Multiplier • Toxic Environment Resistance • Toxic Resistance • Animals Learning Factor • Global Learning Factor • Neural Heat Limit • Psychic Sensitivity • Leather Amount • Meat Amount • Neural Heat Recovery Rate • Meditation Psyfocus Gain • Neural Heat Gain (Factor) • Ideoligion Spread Chance • Global Certainty Loss Factor • Terror • Raw Nutrition Multiplier • Learning Rate Factor • Cancer Rate Factor • Fertility • Hemogen Gain Multiplier
- Non Pawn
- Construction Speed (Material Factor) • Deterioration Rate • Sell Price Multiplier • Beauty • Outdoor Beauty • Cleanliness • Comfort • Work To Make • Food Poison Chance (Food Stat) • Shooting Accuracy (Turrets) • Style Dominance
- Mechanoid
- EMP Resistance • Bandwidth Cost • Energy Usage Multiplier • Wastepacks Per Recharge • Control Taking Time • Repair Energy Cost
- Apparel
- Armor - Material Effect Multiplier • Insulation - Cold - Material Effect Multiplier • Insulation - Heat - Material Effect Multiplier • Equip Delay • Pack Radius • Shield Recharge Rate • Shield Max Energy • Insulation - Heat • Insulation - Cold • Armor - Heat • Armor - Blunt • Armor - Sharp • Jump Range
- Weapon (Ranged)
- Ranged Damage Multiplier • Ranged Cooldown • Accuracy (Long) • Accuracy (Medium) • Accuracy (Short) • Accuracy (Close)
- Weapon (Melee)
- Melee Damage Multiplier • Melee Weapon Average Armor Penetration • Melee Damage Per Second
- Building
- Research Speed Factor • Max Power Output • Medical Tend Quality Offset • Work Speed Factor • Work Efficiency Factor • Work To Build • Door Opening Speed • Rest Effectiveness • Immunity Gain Speed Factor • Recreation Power • Surgery Success Chance Factor • Reading Bonus • Trap Spring Chance • Trap Melee Damage • Biosculpter Pod Speed Factor • Assembly Speed Factor • Baby Play Power • Birth Quality Offset • Genetic Complexity Increase
- Ability
- Detection Chance • Goodwill Impact • Effect Radius • Duration • Range • Psyfocus Cost • Neural Heat Gain • Casting Time • Psylink Level
- Stuff Stat Factors (Multipliers when made of this)
- Melee Cooldown • Sharp Damage • Blunt Damage • Insulation - Heat (Material Factor) • Insulation - Cold (Material Factor) • Armor - Heat (Material Factor) • Armor - Blunt (Material Factor) • Armor - Sharp (Material Factor)
- Mechanitor
- Mech Bandwidth • Mech Control Groups • Mech Gestation Speed • Mech Remote Repair Distance • Mech Remote Shield Distance • Mech Remote Shield Energy • Mech Repair Speed • Subcore Encoding Speed • Mech Work Speed Offset
- Pawn | Combat
- Stagger Time Multiplier • Ranged Cooldown Multiplier • Aiming Time • Pawn Trap Spring Chance • Incoming Damage Multiplier • Accuracy Factor (Long) • Accuracy Factor (Medium) • Accuracy Factor (Short) • Accuracy Factor (Close) • Shooting Accuracy (Indoors Dark • Indoors Lit • Outdoors Dark • Outdoors Lit ) • Mortar Miss Radius Multiplier • Melee Armor Penetration • Melee Dodge Chance (Indoors Dark • Indoors Lit • Outdoors Night • Outdoors Day ) • Melee Hit Chance (Indoors Dark • Indoors Lit • Outdoors Dark • Outdoors Lit ) • Melee DPS • Melee Damage Factor • Melee Cooldown • Melee Door Damage Factor • Shooting Accuracy Multiplier (Child)
- Social
- Bond Chance Factor • Train Animal Chance • Tame Animal Chance • Arrest Success Chance • Beauty (Pawn) • Social Impact • Drug Sell Price Improvement • Trade Price Improvement • Negotiation Ability • Suppression Power • Conversion Power • Slave Suppression Fall Rate • Animal Products Price Improvement
- Work
- Cleaning Speed Multiplier • Butchery Speed • Mechanoid Shredding Speed • Hunting Stealth • Research Speed • Smelting Speed • Smoothing Speed • Animal Gather Speed • Animal Gather Yield • Drug Cooking Speed • Drug Synthesis Speed • Butchery Efficiency • Mechanoid Shredding Efficiency • Cooking Speed • Food Poison Chance • Plant Work Speed • Plant Harvest Yield • Drug Crop Harvest Yield • Reading Speed • Repair Success Chance • Construct Success Chance • Construction Speed • Medical Tend Speed • Medical Tend Quality • Medical Operation Speed • Medical Surgery Success Chance • Mining Speed • Deep Drilling Speed • Mining Yield • General Labor Speed • Global Work Speed • Hacking Speed • Pruning Speed • Activity Suppression Speed
• Study Efficiency • Entity Study Rate - Hidden
- Bed Hunger Rate Multiplier