raven has a good point that it may just be a resistnace and not immunity, think back to tommy turning, he had a gash on his neck and came into contact with Z blood after burt put a hole throught the jumper in the tower! he didnt turn straight away, he got angry/frustrated with auntie kelly first, it took longer than a few minutes as riley described in the early chapter.
Saul has come into direct contact with zombies from day one so maybe the more time spent near/killing the more resistant you become?!?
if the anti-biotics are protecting Saul we will find out in the next episode im sure, but why the fuss over tanya, the story line hasnt mentioned her using them and why would she? there must be a link bewtween the tinks!!!
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