More than 10,000 doses of children's swine flu vaccines were recalled in Louisiana. That's part of 800,000 doses for kids six months to three-years-old all over the country.
A french manufacturing company said the tests show the vaccine may have lost some strength, but there is no safety issue involved.
Doctors say some parents are concerned by the recall, but they urge parents to get their children vaccinated.
Health officials found that 684 doses of the recalled vaccine were administered to children in Louisiana. They don't know which providers in the state had given these out.