What is D0g3?
D0g3 is the Necroa Virus you play as in the "Dont Touch Doge" custom scenario.
What does it look like?
It looks like this:
Is it fatal or non-fatal?
The virus isn't fatal, but what it turns dead people into is. You can find them here:http://plague-inc-custom-scenario-dont-touch-doge.wikia.com/wiki/Doges