Allergy

Similar term(s): hypersensitivity, allergen, allergic reaction, allergic disease, allergic disorder.

Allergies are inappropriate or exaggerated reactions of the immune system to substances that, in the majority of people, cause no symptoms.

Symptoms of the allergic diseases may be caused by exposure of the skin to a chemical, of the respiratory system to particles of dust or pollen (or other substances), or of the stomach and intestines to a particular food.

Source: ACAAI Allergy-Immunology Glossary 

An allergen is a substance that causes an allergy.

Asthma - Rhinitis

GreenFacts Summary on Respiratory Diseases in Children:

• 4.2 What respiratory diseases can outdoor pollution lead to?
• 1. To what extent do respiratory diseases affect children?

Deutsch: Allergie
Español: Alergia
Français: Allergie

Respiratory Diseases

Genetically Modified Crops

Ozone

Particulate Matter

Nitrogen Dioxide