User blog comment:Deafro/Are Hunters Immortal?/@comment-9090085-20131209020916

I highly doubt any souled being in Remnant is immortal, considering the social ramifications of such a thing are not present - and there seem to be a number of old people anyway(if Aura could negate the effects of aging, no-one would get old). They might live longer then we do, and they can probably remain physically active much later in their lives, but are not immortal(they probably would have made a bigger deal about Aura if it was the case)

Besides, we would probably see Jaune's great-great grandfather if that was the case.

Actually, if we think of Aura as a shield, then the healing ability is drawn from your shield, meaning when your shield runs out you can't heal. Conversely, if you're using your Aura to heal, your shield is being exhausted. Plus, since we saw Jaune's "lot of Aura" almost depleted by just two strikes from the Ursa Major, Aura is not some "unlimited" source of power - it runs out quickly.(we don't see how long it takes to recharge, but it probably takes a few minutes, minimum. and it won't recharge if you're using it constantly to heal.)

I could definitely see Aura accelerating natural healing; allowing the people of Remnant to recover in weeks what would take us months.

If any beings are immortal, it's the soulless Grimm; I still believe that the Death Stalker in ep.8 is almost as old as the ruins in that episode(at least).