Thanks to the prospect of a mutated H1N1, Americans will enter this year's flu season with trepidation. Researchers are closer to developing vaccines, but the only way to verify that the immunizations are safe is to test them on human volunteers. We talk to one such brave subject, Gordon Potts, who got a vaccine yesterday. We also talk to Dr. Mark Mulligan, executive director of the Hope Clinic at the Emory Vaccine Center.