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.
Critical limb ischaemia is the most severe form of peripheral arterial disease and is often a result of arteriosclerosis or diabetes. It is characterised by resting ischaemic pain, nonhealing ulcer and gangrene. Untreated, 50% of patients with CLI will proceed to limb amputation and 25% will die within 1 year.