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Originally designed as a perk adding a flat skill bonus to Doctor and +5 damage against living creatures, with the SPECIAL variant used in Fallout: New Vegas the bonuses became minor. As such, Obsidian changed the bonus to allow players to view the specific defenses and health amount of enemies targeted in VATS, with the +5% damage bonus (now percentile, rather than a flat amount) being a secondary bonus. In effect, Living Anatomy became a new version of Awareness.