 It was downgraded to a Category 3 this morning, but now back up to a Category 4. It's expected to make landfall at some point in those islands before heading forward towards Jamaica, and then the current track has it going towards Mexico. A just-released study says the U.S. leads other high-income countries in a dubious category, the highest number of deaths of young people. CBS News medical contributor Dr. Selene Gounder.