User blog comment:WarrenWitch/Sembura :D/@comment-82.33.101.54-20131027123712/@comment-3146930-20131028004454

It depends on how you view Aura. If Aura simply acts like a barrier to prevent harm to the user, then any harm they do receive wouldn't be able to be healed with Aura. It would only prevent any further damage.

However another way to look at it is that Aura makes the body stronger in general. So far the only people we have seen show any kind of strong Aura use are Lie and Jaune. Pyrrha is obviously knowledgeable in its use, but hasn't been shown to use it in battle. But back to my point, everyone in the show has been shown to survive impossible falls, attacks, and can react to recoil with impossible calculations. If this is truly the result of Aura, then it would make the body stronger, which includes the healing process. Now because Pyrrha noted Jaune has a lot of Aura, that means there are those with weaker Auras (Nora, Ruby, and Weiss as examples). The amount of Aura could determine the regeneration abilities and their level.