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The H1N1 flu vaccine will be available earlier than had been expected, the director of the nation's top disease agency told CNN on Monday.

"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.

Previously, the CDC had been predicting the vaccine would not be available before middle or late October.

Frieden said that the vaccines appear to confer protection from the virus eight to 10 days after they are administered.

The news about the vaccine against H1N1, also called swine flu, comes a week after researchers concluded that a single injection would suffice to protect against the virus. Read full article »

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