Unique Abilities are abilities that are special to a certain plague type.
List and summaries of unique abilities
Bacterial Resilience hardens the bacterial shell of a plague, increasing resistance to climates.
Viral Instability increases the chance a plague mutating symptoms.
The Spore Burst ability trees lets the player spontaneously infect countries with spore eruptions. Spore Burst infects one country, Spore Eruption five, and Spore Hardening infects countries indefinitely.
Neural Atrophy allows a plague to manipulate the brain to make complex work extremely hard. Infected scientists are set back very far with this ability.
These unique abilities unlock, deactivate, or prevent lethal genes from evolving overtime. When all three trees are evolved, the Unlock Annihilate gene is unlocked, which will "unleash Armageddon unto the world!"