Some substances are more toxic than others. The toxicity of a substance is described by the types of effects it causes and its potency. 1  Types of Effects: Different chemicals cause different effects.
I think I remember reading that injured means bruises and lascerations, seriously injured meant hospital but not life threatening, critically injured meant hospital ICU time and fatally injured meant injuries leading to dying sometime later.
cerebrovascular accident, cerebrovascular insult (CVI), an abnormal condition of the brain characterized by occlusion by an embolus, thrombus, or cerebrovascular hemorrhage or vasospasm, resulting in ischemia of the brain tissues normally perfused by the damaged vessels. The sequelae of a cerebrovascular insult depend on the location and extent of ischemia. Paralysis, weakness, sensory change, speech defect, aphasia, or death may occur. Symptoms remit somewhat after the first few days as brain swelling subsides.