5 month old fever for 3 days but otherwise well

[yellowsands0211]

Hi Mums! I would just like to ask if any of you have an experience with your babies running a fever (37.8 to 38.7C) but otherwise no other symptom? My 5 month old boy has had fever for 3 days now, he has been seen in A&E on the first day as I thought he had Uti reinfection. We were however sent home as his bloods and urine came out clear. He's not chesty either and his throat and ears has been seen by the GP today. He has been diagnosed with viral fever?