A virus created immortals. Vampires and werewolves carry this virus due to their progenitors marcus and william. The most crazy weakness their kinds have is that it is generational.Generation-wise, the further one is from William, the first Werewolf, the weaker a Werewolf becomes (though its possible that this weaker thing refers only to the infectiousness of the the virus). Generation-wise, the further one is from Marcus, the first Vampire, the weaker a Vampire becomes. The same can apply to Selene, as her status as the first Enhanced Vampire-Corvinus strain. So i always wondered does this mean that sooner or later the infection will just end up going away and the infected becoming human after many generation?