User blog comment:Erik6767/Alucard's immortality explained (and why he may be killable)/@comment-26375500-20150829022039

If what you're saying is acually true about all true vampires, then explain why in the first episode of Hellsing, Alucards body is all shriveled up in the cell when Sir Inegra found him? Only till when Integras blood is on the floor from her wound Alucard starts to wake up. I believe that his immortality is based on how many souls he has devoured. When he's fighting Anderson and Anderson uses the The Nail of Helena, Alucard states that he can only be killed by a human. This leads me to believe that what he means it that all the souls he's devoured can only be released by a Human since they have a soul too. That's why when the soldiers are fighting the familiars they do not just reapear like they probaly would have if another Demon or Monster have had defeated them.