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What happens to my body

Allergies – it’s war

Like all armed forces, your immune system makes mistakes. In real life it's called friendly fire. In your body it’s called an allergic reaction. Learn more about this mechanism.

Hay fever

The term hay fever is a misnomer: the condition is not caused by hay, nor does it produce fever. The clinical name is seasonal allergic rhinitis, which is a type of allergy.

Anatomy of a sneeze

Sneezing, also called sternutation, is your body's way of getting something irritating out of your nose. Here's how it works.

How mast cells work

Your body is a weapon. The immune system is a machine of war, ready to take on invaders. The immune system has its own internal affairs department: it can identify cells which are

Asthma

"Asthma" comes from the ancient Greek word meaning "panting" and, if you've experienced an asthma attack, you'll understand why. For some, an asthma attack feels as though an

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