When I was writing this page, I had that revelation as I was writing Lydia's line, that maybe vampires shouldn't really be in a hospital, for obvious reasons. You guys saw the US version of Being Human, right? Heck, as the show went on, the hospital the vampire guy works in actually keypad locks the room that houses all the blood bags, presumably because the other staff noticed small quantities have gone missing, and/or there's a blood shortage.