When balanced, your immune system's inflammatory response will save your life. Injuries and infections are healed with the power of balanced inflammation. Conversely, when your immune system is unbalanced, it is a perpetual fire, affecting every cell of your body.
Imbalance breeds destruction. Just as the earth's climate is changing, an unbalanced immune system is turning against itself in the form of heart disease and autoimmunity. As above, so below.