Re: Fever with no symptoms [Update]
My 7 month old son just had that. High fever (over 103-104 without medicines) for 4 days. Ended up on the 5th day breaking out in a rash and fever disappeared, so they decided it was Roseola, which they didn't consider before running a bunch of tests since he's not in daycare.
However, 9 days is a long time for a fever with no other symptoms! Hope it goes down soon!