In any civil action, if the original harm or injury to a patient is subsequently aggravated (worsens), legal liability will be imposed for the aggravation (rather than for the original injury, or for both the original injury and its subsequent aggravation). This is (obviously) because transaction costs are high in seeking, and finding liability for the original harm or injugy, inrelevant or immaterial in seeking and finding liability for the original harm or injury. cannot be determined from the original harm or injury. non existent in seeking and finding liablilty for the original harm or injury quite low in seeking and finding liatality tor the original harm or injury..