Hi, I had flu last week with fever and pain in my back, without cough at first days. Under this condition of fever and pain x-ray scan reported no infiltration, normal lung field,bronchovascular, great vessels, heart , trachea, and also no discrete mass, without pleural effusion. However a hyperaeration was noted in both lungs. I have under treatment of allergy, with formoterol and flixotide, because some times have a little breathless, when contact with chemical materials, or some flowers, and foods especially at the end of Summer. Do much exercise and swimming without problems. Does the hyperaeration some thing to be worry bout? Many thanks.