Theory no 1:
Saul and
Tanya are immune. Saul had more then just one opportunity to get infected (the hybrid at the tank-station, being shot while fending off
Tommy); and Tanya was bitten by a slow-turner.
Theory no 2: Saul and Tanya were quick enough to use the right, hard medication to prevent the infection to spread in their body.
About
Lizzy: No, I think Lizzy is not immune. Spoiler Aler: But 'something' may become immune regarding her; how much of the show have you listened to yet?
Another Spoiler Alert: Hope ... (Just a mad theory made by me ...) This, again, depends of how far you have listened into the show yet ...
All the best!
Liam
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