In Elder Scrolls V w/ DLC’s on Xbox One, I have managed to become both werewolf and vampire at the same time. No cheats, somehow it just happened. I did eliminate and regain beast blood. Maybe i had the vampirism disease when I regained. Whatever the case, I can’t get rid of vampirism, even after searching the guy out, and I don’t want to lose beast blood. Is it better to stay both, or should I continue to try and cure one?