Virus is a standard plague type in both Plague Inc. and Plague Inc: Evolved.


In game Edit

The Virus is a standard plague type introduced in version 1.0. It possesses a high natural tendency to mutate traits alongside its ability Viral Instability, but it struggles to neutralize these mutations. and so requires a different play-style that relies on fast enough infection to nullify any human counter-attack. The gene Darwinist best complements this natural ability, while Creationist can make the mutation rate seemingly more controllable. This is crucial as without the assistance of other genes, it can only mutate symptoms, and that free symptoms can help late game (especially Mega-Brutal) when the early transmission was properly handled. Additionally, devolving traits will cost DNA, increasing as more are done unless the Translesion + Gene is included to prevent the increment.

In real lifeEdit

Viruses are microscopic entities that exist on the fringes of what is known as life. They have a unique set of characteristics that are not found anywhere else in our known world. They are completely dependent on living host cells to replicate, as they are simply proteins when outside of available hosts. Some common examples include the common cold, influenza (also called the flu), chicken pox, gastroenteritis, cold sores, Ebola, HIV (responsible for AIDS), avian influenza (also called "bird flu") and coronaviruses (severe strains include MERS-CoV, SARS-CoV and SARS-CoV-2, responsible for MERS, SARS and COVID-19 respectively).

Special AbilityEdit

The special ability for Virus is Viral Instability. It makes DNA unstable, which further increases the number of random mutations to occur.


Please see Virus Strategy Guides.

Trivia Edit

  • The Virus was one of the 3 plagues from Pandemic, the spiritual predecessor to Plague Inc., alongside with Bacteria and Parasite.
  • The virus playable is said to have DNA; in real life, DNA viruses are relatively stable, while the RNA viruses are known to be genetically unstable, with differing degrees: Flu change its antigens in one to two years, while viruses like HIV mutate constantly.

Stages of Evolution Edit

Standard Plague Types


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