Kids' Swine flu shots recalled; not strong enough

Kids' Swine flu shots recalled; not strong enough

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The issue is the vaccine's strength. Tests done before the shots were shipped showed that the vaccines were strong enough. But tests done weeks later indicated the strength had fallen slightly below required levels.

Why the potency dropped isn't clear. "That's the $64,000 question," said Len Lavenda, a Sanofi Pasteur spokesman.

Young children are supposed to get two doses, spaced about a month apart. Health officials don't think children need to get vaccinated again, even if they got two doses from the recalled lots, said Schuchat.

Swine flu vaccine has been available since earl

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It's not because of side effects, it's because the shot isn't strong enough.

"Experts have a theory that the problem is specific to the children's pre-filled syringes. For some reason, the antigen — the key vaccine ingredient — may be sticking to the walls of those syringes, said Dr. Jesse Goodman, the FDA's deputy commissioner for science and public health."

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