For a second day the director of the National Center for Immunization and Respiratory Diseases testified on the administration's progress against the swine flu.
Dr. Anne Schuchat told the House Energy and Commerce Subcommittee hearing that despite the delays, the Centers for Disease Control is trying to get as much H1N1 vaccine as possible out to the public.
"Many people with underlying conditions or pregnancy disproportionately affected with severe complications. So far no change in the virus," Schuchat said. "It hasn't become more virulent or changed genetically. We still think the vaccine is an excellent match with this virus that's circulating."
The pandemic has now affected 22 million people in 46 states. Almost 4,000 deaths have been linked to the illness.
