According to eMedTv.com over 50 million Americans suffer from allergies. The immune system of an individual that suffers from allergies will react to a normally harmless substance. Examples of allergens that may cause an allergic reaction include:
Dust mites
Pet dander
Mold
Mildew
Pollen
Medication
Food
Insect bites
When a person experiences an allergic reaction their immune system is treating the substance as an [...]