Substances that trigger these reactions are called allergens.

In an allergy, the animal's immune system is hypersensitive to some substances it encounters, called allergens.

These proteins are called allergens and are normally harmless.

Changing climates can affect your reaction to allergy-triggering substances called allergens - but only to a limited extent.

Instead of attacking only the body's enemies, it mounts an all-out assault against innocent substances called allergens, which are almost always proteins.

The particles are called allergens, which simply means they can cause an allergic reaction.

"Both dogs and cats have what we call minor allergens, so it's not only the major allergens," he says.

To prevent allergy symptoms, avoid substances you're allergic to, called allergens.

It also reacts to foreign substances called allergens, which are generally harmless and in most people do not cause a problem.

Substances that trigger an allergic response are called allergens.