Interventions show promise in primary prevention of asthma

It's not clear why some children develop allergies and asthma and some children do not, but scientists know that environmental exposures probably account for the epidemic of the disease that has taken place in the developed world over the last three decades. Consequently, a number of researchers are investigating whether environmental interventions can actually prevent onset of the disease. Taking on such an issue for study is not easy, but early results from one investigation in Canada have thus far yielded promising results.