My two year old has been sick almost none stop over the past year. It seems as soon as antibotics get out of his system he get sick again. Since last June he has ran a temp at least once a month(usually more). He was treated for RSV about 2 weeks ago and is also being treated for asthma symptoms. He finished a round of antibotics about a week ago and as of last Friday has started running fever again. It generally runns between 99-101 but has recently started rising to 103-104.5(it was 104.5 when I took him to the hosp and he tested positive for RSV). I am just wondering what could be some causes for his reaccuring sicknesses and very frequent fevers? His Dr is planning to send him to have extensive blood work done cause he is thinking he may have some kind of an immune diffancy.