Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-14038194-20130807065231/@comment-6383956-20140316144718

I don't think Lydia can turn into a vampire.... being a banshee and all. If she's immune to the werewolf bite and the kanima venom, I'm willing to bet she's immune to vampire bite (and I'm also willing to bet vampires wouldn't want to feed on her anyways with blood like that.)

That's all entirely speculation of course because there are no vampires on Teen Wolf. (Yet?)