User:Akkuuaa/sandbox

What is the background to this research?
Asthma is a disease characterised by chronic airway inflammation, airway hypersensitivity to various irritants and airway obstruction. It is more common in children than in adults. Airway obstruction may be due to smooth muscle spasms of the bronchi and bronchioles, airway mucosal oedema, increased mucus secretion and/or damage to the airway epithelium.

Allergens are substances that trigger an allergic response. Common allergens that can trigger or aggravate asthma attacks include grass, pollen, animal fur, dust and certain food and drugs. Anxiety, stress, strenuous exercise (exacerbated by cold weather) and respiratory infections are among the most common variables .

The diagnosis of asthma during childhood is approximately 10-15% in the Netherlands; similar figures can be found in other countries within Europe and North America.

Asthma affects about 50-74% to nearly 90% of children, due to physical limitations they tend to avoid physical activity because of symptoms such as shortness of breath, also called exercise induced bronchoconstriction (EIB).