Our LO has had a high fever since Wed. afternoon and I took her to the Dr. on Thurs and they said to watch it for another 48 hrs.  She is still sick and had 103.9 this morning...her nose finally started running so at least there's another symptom.  Have your LO's had long lasting fevers?  DH is really worried ;(                
                             
        
Re: fever for 72 hrs
Fever that high with meds? I'd be worried. If you haven't tried meds, I'd try that first. Sometimes one or two doses just knocks it out if V's system.