A few holistic suggestions. First one is to eliminate dairy products from her diet for a while; since they create mucus. If the fever is not too high, let it run it's course, as it's her body's way of activating the immune response. Give her acidophilus either powder in applesauce or chewables. This will help to build up the normal bacteria in her intestines. A ginger compress would be fine for her. Get a fresh piece of ginger about the size of your first finger and slice it into boiling water. Then let it slow boil for about 10 mins. Put a hand towel in the water. Turn the boil off, and put the towel in the water and let set there for about another 10 minutes. If her congestion in only in her throat,put the towel losely around her neck. If in her chest, put it on her chest. Cover the towel with plastic then another towel. Put it on as hot as she can tolerate. Then take it off when she tells you it is getting cool. Best to do before bed.
Lastely, as most important. Elderberry syrup. This will kick out anything viral.