Millions of newly produced doses of the 2009 pandemic influenza A(H1N1) vaccine have arrived in federal quality-control warehouses in the past week and are now ready for overnight distribution to communities across the United States, Dr. Thomas Frieden, director of the U.S. Centers for Disease Control and Prevention, announced at a press briefing on Oct. 27.His message to physicians, hospitals, and health departments was simple: “Give it out as soon as it comes in, because more is on the...