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.
The term total recordable injuries (TRI) includes all fatalities, lost time injuries, cases restricted for work, cases of substitute work due to injury, and medical treatment cases by medical professionals (doctors, nurses, etc.). It does not include any first aid injury. Help People Affected by Hurricane Harvey.