[quote=“Snaaty, post:4, topic:7129”]
the water supply is already contaminated
Waaait, what??
And I’ve been drinking it all the time?[/quote]
The player character is full of goo and has been since before game start. This is why you e.g. heal life-threatening injuries overnight and develop b-movie style mutations from being irradiated.
(This means that you will turn into a zombie, but not until you die from something else. In Cata infection doesn’t turn you into a zombie directly, it animates your corpse.)