User blog comment:JAlbor/Wikia at E3 2012/@comment-4473559-20120523213420/@comment-3981209-20120525130823

I assumed that they had turned off the HUD so we could see more of the action. I hope it isn't a regenerative health bar, and that when playing as Desmond we also have a health bar (Ah, Desmond, you fall from Villa Auditore's roof and take no damage? Lets see Ezio try. Oh, wait, that kills him.)