My Grandson who has just turned 10 is into his 4th week of illness. It started with a sore throat and very nasty cough ,he is normally quite Bronchial so nothing too unusual there. From there it progressed tp An almost constant headache and some vomiting. The most prevalent and long lasting thing is his tiredness. He sleeps or rests all day and everyday. Not much interested in food (which he loves) or his other love Soccer. He has been tested for Glandular Fever but negative. The Doctor thinks he has what he called a real Flu. How long should we wait and what should we do?