Swine Flu @ school

Tonight I found out one of my son's classmates was diagnosed today with Strep and the Swine Flu. How do I feel about that? I am balancing on a thin wire, part of me is absolutly terrified and the other isn't too worried. I know it is a serious strain of the flu, but the flu changes every year anyway, right? The normal flu we know about kills thousands yearly and puts them in the hospital. So really what is right, to freak out and keep my son out of school? No, he was already around this child last week-would it really make a difference? So I will pray that my son stays healthy and doesn't get the flu, if he does I will worry about it then. It is all in God's hands...