The U.S is a pet-friendly country and most people own a pet. It also proven
A dog is a man's best friend. But if you're allergic to these furry animals
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