The latest epidemiological research suggests exposure to even very small amounts of certain pollen types can trigger symptoms in children who suffer from asthma.
Asthma affects more than 300 million people worldwide and its prevalence is increasing on average by 50 per cent every decade. It currently affects 1 in 10 children in developed nations and is the third raking cause of hospitalization among children under the age of 15 years.
Asthma is an atopic condition meaning that it shares a biological relationship with the allergic conditions hay fever and eczema/allergic dermatitis. These conditions are frequently "co-morbid" - meaning an individual who suffers from one is more likely to suffer from another. Also, a parent with an atopic condition is more likely to have a child who develops any for of atopic illness. The present study looked at the effects of ambient pollen exposure on asthma symptoms in all asthmatic children, whether they also had allergies to pollen or not.