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Symptom Combos

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Symptom Combos are special combinations of Symptoms (and in some cases Transmission traits) that can affect plague stats, as well as trigger special events which can slow or speedup Cure progression, or draw attention to the disease. All combos have an achievement associated with them.

Note that it seems to take a while for symptom combos to appear and take effect. Also note that the list may not be complete.

CombosEdit

To achieve a combo, one must evolve two or more different symptoms. They range from two tier 1 symptoms to eight symptoms and two infections, so using them is a viable strategy for new players and advanced players alike.

StandardEdit

Name Effects Symptoms
Projectile Vomiting Increases Infectivity

Vomiting

Coughing

Walking Dead Decreases Cure Production

Insomnia

Anaemia

Profuse Bleeding Slightly increases lethality, greatly increases infectivity

Haemophilia

Skin Lesions

Oops

Lowers productivity but draws attention to the plague.

Diarrhoea

Sneezing

Public Defecation Increases infectivity and draws attention to disease

Insanity

Diarrhoea

Swine Flu Slight increase in work needed for a cure

Coughing

Diarrhoea

Insomnia

Nausea

Pneumonia

Vomiting

Livestock I

Livestock II

Necroa VirusEdit

Name          Effects                    Symptoms

Vampire Bat

Increases Severity, Infectivity, and Lethality.

Vampiric Hunger

Bat 1

Bat 2

Blood in the Air

Increases Severity

Cathemeral Shift

Delirium

Hyperosmia

Tank Slight Severity boost

Anabolic Boost

Bone Dysplasia

Spitter Slight Severity boost

Naja Mortis

Enhanced Sensory Integration

Boomer Slight Severity boost

Autothysis

Liquefactive Necrosis

Cranial Dispersion

Severity Boost

Cranial Elephantitis

Air 3

Walking Contradiction Slight Severity decline PhotophobiaCathemeral Shift
Runner Slight Severity boost

Enhanced Motor Control

Engorged Quadriceps

Bath Time Infectivity Boost

Autophagia

Cannibalism

Polyphagia

Simian FluEdit

Name          Effects                    Symptoms
Assassin Increases Ape combat abilities

Ape Rampage

Primal Awareness

Blind Genius Increases Cure Production

Blindness

Neuro-enhancement 3

Discovery Channel Increases Ape to Ape transmission

Primal Hunt

Social Cohesion

Fly Magnet

Increases cross-species transmission

Hominidae Bridge

Unknown

Red Ape Redemption Increases Ape combat abilities

Horseback Riding

Weapon Creation

Rude Awakening Increases Ape to Ape transmission

Scouts

Excrement

TriviaEdit

  • The Boomer, Tank, and Spitter combos may be based on zombie types from Valve's Left 4 Dead franchise.

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