My almost five year old son has had recurring fevers for a month now. They usually range between 101 and 104, although it has gotten as high as 105. During the first round his sister was sick with the flu and he seems to have caught it. His fever (accompanied by chills and aches ) lasted 5 or 6 days. About two weeks later the fever returned with chills and aches (including headache ), sensitivity to light and about 12 hours of vomiting. The fever lasted 2 to 3 days. Less than a week later his has fever returned again with chills and headache but no vomiting. He has been complaining of leg pain persistently as well.