It seemed silly for Liv to freak out about the existence of other non-human creatures, but what Matt said sounded supernatural. What Liv had was some sort of medically explained infection, but at least her condition still sounded as though it were within the realm of science.
"So do other people think vampires exist, too? Is everyone just cool with that? That's just like a thing here? People look the other way?"
Liv was either hung up on vampires being real or she was chickening out and deflecting from her own situation.