User blog comment:Deafro/Are Hunters Immortal?/@comment-10380701-20131209093200/@comment-3146930-20131210045021

The Hulk isn't immortal, he just has a freakishly good healing factor. Bruce Banner on the other hand doesn't get too many benefits from the gamma rays and it isn't like it hurts him at all. Vandal Savage on the other hand can be considered a true immortal as he hasn't age from the time he was a caveman. He also can't be killed as far as I know as he will always regenerate to that point in time.