Immunity is the balanced state of multicellular organisms having adequate biological defences to fight infection, disease, or other unwanted biological invasion, while having adequate tolerance to avoid allergy and autoimmune diseases. Low or poor immunity results in increased chances of catching colds, flu, infections, and cancer.
Causes:
The immune system is greatly impacted by your emotional state, level of stress, lifestyle, dietary habits, and nutritional status. Nutrient deficiency is the most frequent cause of a depressed immune system. A number of clinical and experimental studies indicate that any single nutrient deficiency can greatly damage the immune system.