Is Lizzy pregnant or infected?

[yarri]

Yarri,

I've been hit by spent shell casing a LOT of times and from a good number of different weapons. Not one of them tickles. LOL.

Ok, lets say this happened:
They used Saul's knife as a scalpel substitute. What if Saul's attempt to clean said knife weren't as good as he thought? What if bleach were the only way to kill whatever was left on the blade or embedded in the hilt?
Saul is now immune, but is now a carrier. He and Lizzy swap spit...or more and now guess what?

I don't believe that, but I'm putting it out there because it's more plausible than the gun shot theory in my eyes.

Ok I will jump on your band wagon for the moment

First point :The way a virus is used to immunize someone is its weakened or killed either of these two states will trigger a response from the immune system. He could be immune other then a carrier. To be immunized doesn't mean your a carrier see second point.
Second point: To be a carrier he would have to be infected with the Z virus survive it. I don t see point 2 being realistic as no one survives the Z virus

Third point : If he is immune and he and Lizzie swapped spit and other more interesting genetic materials the resulting offspring would have a 50/50 shot at being immune.