Vampire syndrome is one a person human or werewolf has a vampire parent or one a human that used to be a vampire has a child as a result the child will have a longer lifespan and things when a werewolf has a vampire parent they may randomly go into fits of Rage eventually turning into bloodlust however this can be dealt with by food and therapy and it's mostly just sometimes just gives things to a werewolf in their human form or a human fangs