The Effect of Cow Milk Consumption on Respiratory Symptoms and Pulmonary Functions in Asthmatic and Non Asthmatic Children

the investigators hypothesis is that milk consumption, either in the acute phase and through prolonged exposure, does not cause or increase respiratory symptoms or airway inflammation. the investigators aim to objectively prove this by examining respiratory symptoms and signs and objectively measuring parameters of airway inflammation and hyper responsiveness after consumption of cow milk or soy milk substitute.