Hi, Welcome to Hcm, As you have rightly pointed that the symptoms are surely suggestive of a viral illness. These problems are commonly seen with viral illness. Not able to eat is also associated. The appetite decreases and child feels very lethargic. Best treatment in such situarion like this is to support with as much liquids as possible. Fruit juices, rice porridge, tender coconut water, bread etc are usually liked. He needs to be given paracetamol round the clock and rest. He should recover in couple of days. If still fever persists after 5 days, get his blood and urine tested . hope this helps. Happy to clear any further queries. Take care.