[Jamesy]

Gaga's character has described the vampire thing as a 'virus' several times. So you're still alive and can die, but the 'virus' prevents ageing and gives you the need to feed on fresh blood in order to survive. Basically biological immortality with a vampire twist.

Didn't The Countess say a few episodes ago something along the lines of 'you will be immortal if you are careful'?

I kind of wish they kept more towards the traditional vampire themes, and made it darker a bit like True Blood.