question: my 23 month old daughter gets sick about once a week, vomiting and high fever. We take her to the doctor, they check ears, flu, strep and even pnemonia, always negative. The say must be a virus. Usually goes away in about a day, but then happens again the very next week. She is not in daycare. She stays home with father and 4 year old sister. Why might she be gettin sick so often? Do I need to take her to the doctor every time?