Can asthma be prevented?

Recent studies would suggest that by reducing a child's exposure to allergy triggers, not only are you helping get rid of annoying nasal symptoms like a stuffy, runny, itchy nose, but you may be preventing the development of asthma. 

Researchers describe the progression of symptoms from skin allergies (eczema) in babies to nasal allergies in toddlers and kindergarteners (allergic rhinitis) to asthma in older children as "the atopic march".  This tends to happen when there is continuing exposure to things that the child is allergic to, such as dust mites or pollens.  The better the environmental control of these allergens, the less likely symptoms will progress to more severe conditions such as asthma.