Hi einstind
There is no such a thing as Viral Fever, because
1.If it’s viral there is no fever in the body.
2. If there is fever it means there is infection somewhere and the natural body defense is trying to fight it by increasing the body temp.
The fact she is in daycare that means exposed to many new things to her system teach her always to wash her hands. 3 years old are very smart and can remember rules :)

This is what I personally do when my kid doesn’t feel well:
1. No medication (NO Antibiotic)
2. Keep checking the temp. Every 1/2 hr.
2. Take him to my chiropractor for spinal adjustment (Dr. Cyrus is our chiropractor here in Doha) that will help the child's natural immunity system.
3. Chicken soup with lots of onion and garlic.
4. No sweets or fried food.
5. Let her eat plain yogurt it helps to reduce the inner body temp.
6. Light clothes and keep washing her feet with cold water.

Hope this will help