800,000 doses of swine flu vaccine recalled

Manufacturer Sanofi-Aventis says vaccine meant for children younger than 3 has lost some of its potency. The CDC says there are no safety concerns. Vaccine manufacturer Sanofi-Aventis is recalling 800,000 doses of H1N1 vaccine meant for children younger than 3 because the influenza vaccine has lost potency since it was shipped from the factory.

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