My little girl seems to be constantly getting sick. She had tonsilitis with a chest infection in November, tonsilitis again in January. Two weeks ago she got a cold, with earache, temps up and down, followed with an eye infection andtonsilitis again, and is coughing constantly throughout the night. Doctor tells me this is all normal for the age, which I am inclined to believe, however, her tonsils are allways enlarged which concerns me. I would really like to boost her immune system any suggestions would be welcome. Other people have told me to see an ears, nose and eye specialist- again doctors tells me not neccessary.. How can I tell if this cough is an infection or virus?