Not sure exactly...was in an Urgent Care facility the other day (hubby jammed his finger while snow tubing) and there was a little kid literally RUNNING around the waiting room, yet the parent claimed he had a temp of 105. Hubby I agreed that was highly unlikely given the fact the kid was jumping around and playing. Personally, I think if he did have a temp that high, the ole Urgent Care nurses would have sent him to the hospital. Basically, all I can say is if you're worried and it isn't going to down, like Tab said, get thee to the Doc!