Universities and public-school districts spent the summer preparing for swine flu. For some colleges, however, the virus popped up sooner than expected. Four Ohio schools -- Miami, Xavier, Cedarville and Cincinnati -- have cluster cases of the flu, according to state health officials. "We knew we were going to see it, but to have it happen so quickly surprised us a little bit," said Debora del Valle, spokeswoman for Xavier. The Cincinnati school has 110 suspected flu cases and canceled large events through Labor Day. No cases have been reported by Ohio public-school districts. Yesterday, President Barack Obama urged Americans...