My almost 4 yo son has had a fever off and on for 6 days today. Very runny nose, chills, hacking cough, etc. He also says the back of his legs hurt. He has asthma and has been hospitalized the last two winters b/c of his sat levels and pneumonia. When I put my ear to his back, he is moving air and I don't hear wheezing. He improved for two days in the middle of all this, with only a slight fever at night, but now it's constant. Also, my three month old was diagnosed A positive for the flu.