The Leeds Teaching Hospitals NHS Trust

Children's Allergy Service

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Welcome to the Leeds Children's Hospital Allergy Service

Who Are We?

Welcome to the webpage for the children's allergy service in Leeds. This page contains information for both our patients, and any healthcare professionals working caring for children with allergies.

What is an Allergy?

Allergy is defined as an over-reaction of the immune system to a food or substance in the environment (called an allergen), which would be otherwise harmless to most people.

The body recognises the allergen as a threat, and produces antibodies (called IgE) to 'remember' the allergen - similar to how the body fights off a virus.

In an allergic reaction, the antibodies recognise the allergen and trigger the immune system to react.