mutation question

[papadooks]

so with the random mutations I've only seen it effect the symptoms. is this by design or have I just not seen it randomly mutate other things yet ?

if it's only meant to mutate symptoms it seems a bit silly especially on the virus since they are known for randomly mutating new transmission vectors and drug resistances

[LiquidBacon]

There are unlockable genes which enable plagues to mutate transmitions or abilities.