Cow's milk protein (CMP) allergy is one of the most common food allergies and potentially a fatal one. Early feeding with CMP has been considered in the past as a risk factor for development of CMP allergy in high risk infants. Although other studies argue with this assumption and suggest early exposure to CMP might be protective against atopic dermatitis and CMP allergy. A cohort study that first introduction of CMP after 15-30 days of age, raised the risk for CMP allergy.The aim of this study is to investigate if early and continuous exposure to CMF will decrease CMP allergy rate.