The immune system reacts against foreign substances that enter the human bo
An allergy is a reaction by the human immune system to anything that is not
The role of the body's immune system is to fight bacteria and other disease
Allergies are hypersensitive immune responses to foreign substances like po
Pollen allergies are annoying, and so are the drugs we pop to relieve sneez
Have a runny nose, an itchy eye, and the irritating sensation of not being