AstraZeneca Plc recalled 4.7 million doses of its nasal spray version of the swine flu vaccine after routine tests showed a decline in potency, U.S. regulators said.
The doses remain safe, and people who have already been inoculated don’t need to get vaccinated again, said Norman Baylor, director of vaccines research and review for the U.S. Food and Drug Administration. About 3,000 of the affected doses remain in warehouses, and AstraZeneca will send recall notices to clinics that may have unused vials of the vaccine.
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