मोनब्रै गुबै आबहावायारि जाहोनफोरा जादों आगु उनदै समनि सनदेरथि गोनां बेरामफोर नुजानायनि सोलाय - सोलफोर , आबहावायारि गुबुंले , एलारजेन बिबांफोर , आरो आदारारि सोलाथिफोर ।
The four main candidate environmental factors are alterations in exposure to infectious diseases during early childhood environmental pollution allergen levels and dietary changes .