PHILADELPHIA (AP) Hundreds of youngsters in at least seven states have broken out in mysterious rashes, and some health investigators suspect it might be caused by a new or yet-to-be-identified virus. The red, itchy rash appears to be more an annoyance than a serious health threat, but it has managed to temporarily close schools, worry parents and frustrate school administrators, for whom answers have been elusive. Students in Pennsylvania, New York, West Virginia, Virginia, Ohio, Oregon and Washington state have complained about rashes on the face, arms, legs and body. For the most part, the rash goes away when the students leave school.