The story

The Food and Drug Administration has approved applications from four manufacturers to make H1N1 flu vaccine, the secretary of the Department of Health and Human Services said Tuesday.

"We will have enough vaccine available for everyone," Kathleen Sebelius told the House Energy and Commerce Committee.

The plan is to begin the large-scale vaccination program in mid-October in as many as 90,000 sites, though limited amounts of the vaccine are expected to be available a week to 10 days earlier, she said.

Monday, the director of the nation's top disease agency told CNN the vaccine will be available earlier than had been expected.

"We think the first doses of some of the vaccine forms should be available in about three weeks," said Dr. Thomas Frieden, director of the Centers for Disease Control and Prevention. Read full article »

All About Centers for Disease Control and Prevention • Swine Flu